1 9V9 1-{2,5-anhydro-4-[(phosphonooxy)methyl]-alpha-L-lyxofuranosyl}-5-methyl-2-sulfanylidene-2,3-dihydropyrimidin-4(1h)-one 1.000 2 ATL [(1s,3r,4s,7r)-7-hydroxy-3-(thymin-1-yl)-2,5-dioxabicyclo[2.2.1]hept-1-yl]methyl dihydrogen phosphate 0.917 3 TLN [(1r,3r,4r,7s)-7-hydroxy-3-(thymin-1-yl)-2,5-dioxabicyclo[2.2.1]hept-1-yl]methyl dihydrogen phosphate 0.917 4 A1AAZ 2-thio-thymidine 0.913 5 A1I9V 5-methyl-2-thio-uridine-5'-monophosphate 0.875 6 1TL 1-{2,5-anhydro-6-deoxy-4-[(phosphonooxy)methyl]-alpha-L-mannofuranosyl}pyrimidine-2,4(1h,3h)-dione 0.840 7 LCC [(1r,3r,4r,7s)-7-hydroxy-3-(5-methylcytosin-1-yl)-2,5-dioxabicyclo[2.2.1]hept-1-yl]methyl dihydrogen phosphate 0.840 8 RCE 1-{2,5-anhydro-6-deoxy-4-[(phosphonooxy)methyl]-beta-D-gulofuranosyl}pyrimidine-2,4(1h,3h)-dione 0.840 9 TLB 2'-O,3'-C-methylene-arabinofuranosyl-thymine-5'-monophosphate 0.840 10 0DT 2'-deoxy-L-ribo-furanosyl thymidine-5'-monophosphate 0.833 11 DT Thymidine-5'-monophosphate 0.833 12 IMC N1-[2-deoxy-ribofuranosyl]-[2-amino-5-methyl-4-oxo-4h-pyrimidine]-5'-monophosphate 0.833 13 PBT [3-hydroxy-5-(5-methyl-2,4-dioxotetrahydro-1(2h)-pyrimidinyl)tetrahydro-2-furanyl]methyl dihydrogen phosphate 0.833 14 QBT [(2r,3s,5r)-3-hydroxy-5-[(5s)-5-methyl-2,4-dioxo-1,3-diazinan-1-yl]oxolan-2-yl]methyl dihydrogen phosphate 0.833 15 SUR 1-(beta-D-ribofuranosyl)-2-thio-uracil-5'-phosphate 0.833 16 TMP Thymidine-5'-phosphate 0.833 17 US3 1-(2-deoxy-5-O-phosphono-beta-D-erythro-pentofuranosyl)-5-methyl-2-selanylpyrimidin-4(1h)-one 0.833 18 TLC 2-O,3-ethdiyl-arabinofuranosyl-thymine-5'-monophosphate 0.808 19 U8U 5-methylaminomethyl-2-thiouridine-5'-monophosphate 0.808 20 0KZ [(1r,2s,4s,5s)-2-hydroxy-4-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2h)-yl)bicyclo[3.1.0]hex-1-yl]methyl dihydrogen phosphate 0.800 21 10C 4-amino-1-{2,5-anhydro-4-[(phosphonooxy)methyl]-alpha-L-lyxofuranosyl}pyrimidin-2(1h)-one 0.800 22 5HU 5-hydroxymethyluridine-2'-deoxy-5'-monophosphate 0.800 23 5MU 5-methyluridine 5'-monophosphate 0.800 24 64P 5-aminothymidine 5'-(dihydrogen phosphate) 0.800 25 64T 5-hydroxy-thymidine-5'-monophosphate 0.800 26 JDT 2'-deoxy-5-ethyluridine 5'-(dihydrogen phosphate) 0.800 27 MFT 3-methylthymidine 5'-(dihydrogen phosphate) 0.800 28 TAF 2'-deoxy-2'-fluoro-arabino-furanosyl thymine-5'-phosphate 0.800 29 UFR 2'-deoxy-5-formyluridine 5'-(dihydrogen phosphate) 0.800 30 XTL [(1s,4r,6r)-6-hydroxy-4-(thymin-9-yl)cyclohex-2-en-1-yl]methyl dihydrogen phosphate 0.800 31 XTR [(1r,4s,6s)-6-hydroxy-4-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2h)-yl)cyclohex-2-en-1-yl]methyl dihydrogen phosphate 0.800 32 2DT 3'-deoxythymidine-5'-monophosphate 0.792 33 3KA 1-(2-deoxy-5-O-phosphono-beta-L-erythro-pentofuranosyl)pyrimidine-2,4(1h,3h)-dione 0.792 34 5PY 1-(2'-deoxy-5'-O-phosphono-beta-D-erythro-pentofuranosyl)-5-methylpyrimidin-2(1h)-one 0.792 35 9L3 [(2r,3s,5r)-5-(4-azanyl-5-methyl-pyrimidin-1-ium-1-yl)-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphate 0.792 36 D4M [(5r)-5-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2h)-yl)-2,5-dihydrofuran-2-yl]methyl dihydrogen phosphate 0.792 37 DDN 3,4-dihydro-2'-deoxyuridine-5'-monophosphate 0.792 38 DU 2'-deoxyuridine-5'-monophosphate 0.792 39 UMC 2'-deoxy-5'-uridylic acid 0.792 40 UMP 2'-deoxyuridine 5'-monophosphate 0.792 41 CSM 1-{2,5-anhydro-6-O-methyl-4-[(phosphonooxy)methyl]-alpha-L-mannofuranosyl}pyrimidine-2,4(1h,3h)-dione 0.778 42 NTT [(1r,5r,7r,8s)-8-hydroxy-3-methyl-7-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2h)-yl)-2,6-dioxa-3-azabicyclo[3.2.1]oct-5-yl]methyl dihydrogen phosphate 0.778 43 2MU 2',5-dimethyluridine-5'-monophosphate 0.769 44 2ST 5-methyl-2'-se-methyl-2'-selenouridine 5'-(dihydrogen phosphate) 0.769 45 A1BBB 5-(hydroxymethyl)uridine 5'-(dihydrogen phosphate) 0.769 46 A1BBC 1-(2-deoxy-2-fluoro-5-O-phosphono-beta-D-arabinofuranosyl)-5-(hydroxymethyl)pyrimidine-2,4(1h,3h)-dione 0.769 47 BVP (E)-5-(2-bromovinyl)-2'-deoxyuridine-5'-monophosphate 0.769 48 CNU 5-cyano-uridine-5'-monophosphate 0.769 49 CTG (5r,6s)-5,6-dihydro-5,6-dihydroxythymidine-5'-monophosphate 0.769 50 FMU 5-fluoro-5-methyluridine-5'-monophosphate 0.769 51 MDU 3-(hydroxymethyl)thymidine 5'-(dihydrogen phosphate) 0.769 52 PDU 5(1-propynyl)-2'-deoxyuridine-5-monophosphate 0.769 53 T41 1-(2-O-methyl-beta-D-arabinofuranosyl)thymidine 5'-monophosphate 0.769 54 TDY 5-(methylamino)thymidine 5'-(dihydrogen phosphate) 0.769 55 TTM N3-ethyl-thymidine-5'-monophosphate 0.769 56 ULF [(1r,3r,4r,5r,7s)-3-(2,4-dioxo-3,4-dihydropyrimidin-1(2h)-yl)-5-fluoro-7-hydroxy-2-oxabicyclo[2.2.1]hept-1-yl]methyl dihydrogen phosphate 0.769 57 UMX [(1r,3r,4r,5s,7s)-3-(2,4-dioxo-3,4-dihydropyrimidin-1(2h)-yl)-7-hydroxy-5-methyl-2-oxabicyclo[2.2.1]hept-1-yl]methyl dihydrogen phosphate 0.769 58 URX [(1r,3r,4r,5r,7s)-3-(2,4-dioxo-3,4-dihydropyrimidin-1(2h)-yl)-7-hydroxy-5-methyl-2-oxabicyclo[2.2.1]hept-1-yl]methyl dihydrogen phosphate 0.769 59 UVX [(1r,3r,4r,7s)-3-(2,4-dioxo-3,4-dihydropyrimidin-1(2h)-yl)-7-hydroxy-5-methylidene-2-oxabicyclo[2.2.1]hept-1-yl]methyl dihydrogen phosphate 0.769 60 UWJ 5-methyl-1-(2-se-methyl-5-O-phosphono-2-seleno-beta-D-arabinofuranosyl)pyrimidine-2,4(1h,3h)-dione 0.769 61 XTF [(1r,4r,5s,6r)-5-fluoro-6-hydroxy-4-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2h)-yl)cyclohex-2-en-1-yl]methyl dihydrogen phosphate 0.769 62 0U L-uridine-5'-monophosphate 0.760 63 2AU 2'-aminouridine 0.760 64 5CM 5-methyl-2'-deoxy-cytidine-5'-monophosphate 0.760 65 5IU 5-iodo-2'-deoxyuridine-5'-monophosphate 0.760 66 6F7 3'-deoxy-5-methyluridine 5'-(dihydrogen phosphate) 0.760 67 8XU 1-(5-O-phosphono-beta-D-xylofuranosyl)pyrimidine-2,4(1h,3h)-dione 0.760 68 A1IT3 2'-thiouridine-5'-monophosphate 0.760 69 BRU 5-bromo-2'-deoxyuridine-5'-monophosphate 0.760 70 EW3 [(2~{R},3~{R},4~{R},5~{R})-5-[2,4-bis(oxidanylidene)-1,3-diazinan-1-yl]-4-fluoranyl-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphate 0.760 71 FDM 3'-fluoro-3'-deoxythymidine monophosphate 0.760 72 H2U 5,6-dihydrouridine-5'-monophosphate 0.760 73 IC Isocytidine-5'-monophosphate 0.760 74 MUM 5'-O-(dihydroxyphosphanyl)-5-methyl-5,6-dihydrouridine 0.760 75 NYM 3'-deoxy-3'-aminothymidine monophosphate 0.760 76 OHU 2'-deoxy-5-hydroxyuridine 5'-(dihydrogen phosphate) 0.760 77 PST Thymidine-5'-thiophosphate 0.760 78 RSP 4-amino-1-(5-O-phosphono-beta-D-ribofuranosyl)pyrimidine-2(1h)-thione 0.760 79 RUS 1-(5-O-phosphono-beta-D-ribofuranosyl)-2-selanylpyrimidin-4(1h)-one 0.760 80 T49 S4'-2'deoxythymidine 5'-monophosphate 0.760 81 T4S 1-(2-deoxy-5-O-phosphono-beta-D-erythro-pentofuranosyl)-4-hydroseleno-5-methylpyrimidin-2(1h)-one 0.760 82 TSP 3'-thio-thymidine-5'-phosphate 0.760 83 TTI 2'-deoxy-5-telluroxouridine 5'-(dihydrogen phosphate) 0.760 84 U Uridine-5'-monophosphate 0.760 85 U48 5-methyl-2'-deoxy-n3-protonated cytidine-5'-monophosphate 0.760 86 U5P Uridine-5'-monophosphate 0.760 87 UAR Uracil arabinose-5'-phosphate 0.760 88 UCL 5-chloro-2'-deoxyuridine 5'-(dihydrogen phosphate) 0.760 89 UF2 1-(2-deoxy-2-fluoro-5-O-phosphono-beta-D-arabinofuranosyl)pyrimidine-2,4(1h,3h)-dione 0.760 90 UFP 5-fluoro-2'-deoxyuridine-5'-monophosphate 0.760 91 UFT 2'-deoxy-2'-fluorouridine 5'-(dihydrogen phosphate) 0.760 92 70U 5-(O-methylaceto)-2-thio-2-deoxy-uridine-5'-monophosphate 0.750 93 LSH [(1r,5r,7r,8s)-7-[5-methyl-2,4-bis(oxidanylidene)pyrimidin-1-yl]-8-oxidanyl-3,3-bis(oxidanylidene)-6-oxa-3$L^{6}-thia-2-azabicyclo[3.2.1]octan-5-yl]methyl dihydrogen phosphate 0.750 94 S2M 2'-O-[2-(methoxy)ethyl]-2-thiothymidine-5'-monophosphate 0.750 95 UBB 2',3'-dideoxy-uridine-5'-monophosphate 0.750 96 Y5P 1-(5-O-phosphono-beta-D-ribofuranosyl)-1,4-dihydropyrimidine 0.750 97 Z 1-(2-deoxy-5-O-phosphono-beta-D-erythro-pentofuranosyl)pyrimidin-2(1h)-one 0.750 98 MNU (2r,4s)-1-[(4r)-3,4-dihydroxytetrahydrofuran-2-yl]-5-[(methylamino)methyl]-1,2,3,4-tetrahydropyrimidine-2,4-diol-5'-mon ophosphate 0.741 99 ZDU 5-(3-aminopropyl)-2'-deoxyuridine-5'-monophosphate 0.741 100 0U1 2'-methylselenyl-2'-deoxy-L-uridine-5'-monophosphate 0.731 101 5BU 5-bromo-uridine-5'-monophosphate 0.731 102 5DB 1-(2-deoxy-5-O-phosphono-beta-D-erythro-pentofuranosyl)-4-methoxy-5-methylpyrimidin-2(1h)-one 0.731 103 5FC 5-formyl-2'-deoxy-cytidine-5'-monophosphate 0.731 104 5FU 5-fluoro-uridine-5'-monophosphate 0.731 105 5HC 2'-deoxy-5-(hydroxymethyl)cytidine 5'-(dihydrogen phosphate) 0.731 106 5MC 5-methylcytidine-5'-monophosphate 0.731 107 6HT 1',5'-anhydro-2',3'-dideoxy-2'-(thymin-1-yl)-6'-O-phosphoryl-D-arabino-hexitol 0.731 108 A1BT7 2'-deoxy-5-fluoro-5-methyl-5,6-dihydrocytidine 5'-(dihydrogen phosphate) 0.731 109 A1L3O 5-hydroxyuridine 5'-phosphate 0.731 110 A1L82 [(2~{R},3~{S},5~{R})-5-[(2~{R},4~{R},5~{S})-4-azanyl-5-fluoranyl-5-methyl-2-oxidanyl-1,3-diazinan-1-yl]-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphate 0.731 111 A1L9Q 4-azanyl-1-[(2~{R},3~{R},4~{R},5~{R})-3-methoxy-4-oxidanyl-5-[[tris(oxidanyl)-$L^{5}-phosphanyl]oxymethyl]oxolan-2-yl]pyrimidine-2-thione 0.731 112 BMP 6-hydroxyuridine-5'-phosphate 0.731 113 BMQ 1-(5'-phospho-beta-D-ribofuranosyl)barbituric acid 0.731 114 D5D [(1s)-1-[(2s,3s,4r,5r)-5-[2,4-bis(oxidanylidene)-1,3-diazinan-1-yl]-3,4-bis(oxidanyl)oxolan-2-yl]ethyl] dihydrogen phosphate 0.731 115 IU 5-iodouridine-5'-monophosphate 0.731 116 K5X [(2~{R},3~{R},4~{R},5~{R})-5-[2,4-bis(oxidanylidene)pyrimidin-1-yl]-4-fluoranyl-4-methyl-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphate 0.731 117 KBC [(2~{R},3~{S},5~{R})-5-[2,4-bis(oxidanylidene)pyrimidin-1-yl]-2-methoxy-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphate 0.731 118 NUP 6-aminouridine 5'-monophosphate 0.731 119 OMU O2'-methyluridine 5'-monophosphate 0.731 120 S5P 6-sulfanyluridine-5'-phosphate 0.731 121 T32 6'-alpha-methyl carbocyclic thymidine 5'-monophosphate 0.731 122 T48 6'-alpha-hydroxy carbocyclic thymidine 5'-monophosphate 0.731 123 T5O 2'-deoxy-5-methoxyuridine 5'-(dihydrogen phosphate) 0.731 124 T5S 2'-deoxy-5-(methylselanyl)uridine 5'-phosphate 0.731 125 U4M 1-{2,5-dideoxy-2-fluoro-4-[(phosphonooxy)methyl]-alpha-L-lyxofuranosyl}pyrimidine-2,4(1h,3h)-dione 0.731 126 U5M 1-(2,6-dideoxy-2-fluoro-5-O-phosphono-alpha-L-talofuranosyl)pyrimidine-2,4(1h,3h)-dione 0.731 127 U5R 1-(2,6-dideoxy-2-fluoro-5-O-phosphono-beta-D-allofuranosyl)pyrimidine-2,4(1h,3h)-dione 0.731 128 U6M 6-methyluridine 5'-(dihydrogen phosphate) 0.731 129 UMS 2'-methylselenyl-2'-deoxyuridine-5'-phosphate 0.731 130 UR3 3-methyluridine-5'-monophoshate 0.731 131 US2 2'-deoxy-5-(methylsulfanyl)uridine 5'-(dihydrogen phosphate) 0.731 132 USM 2'-S-methyl-2'-thiouridine 5'-(dihydrogen phosphate) 0.731 133 XEC 1-(2-O-methyl-5-O-phosphono-beta-L-ribofuranosyl)pyrimidine-2,4(1h,3h)-dione 0.731 134 XTH 1-(2,3-dideoxy-6-O-phosphono-beta-D-erythro-hexopyranosyl)-5-methylpyrimidine-2,4(1h,3h)-dione 0.731 135 1RN (E)-N-{[4-oxo-1-(5-O-phosphono-beta-D-arabinofuranosyl)-2-thioxo-1,2,3,4-tetrahydropyrimidin-5-yl]methylidene}glycine 0.724 136 LST [(1r,5r,7r,8s)-2-methyl-7-[5-methyl-2,4-bis(oxidanylidene)pyrimidin-1-yl]-8-oxidanyl-3,3-bis(oxidanylidene)-6-oxa-3$L^{6}-thia-2-azabicyclo[3.2.1]octan-5-yl]methyl dihydrogen phosphate 0.724 137 0DC 2'-deoxy-L-ribo-furanosyl cytosine-5'-monophosphate 0.720 138 8RO [(2~{R},3~{S},5~{R})-5-(5-methyl-2-oxidanylidene-7-thia-1,3-diazabicyclo[4.1.0]hept-5-en-3-yl)-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphite 0.720 139 DC 2'-deoxycytidine-5'-monophosphate 0.720 140 DCM 2'-deoxycytidine-5'-monophosphate 0.720 141 DNR 2'-deoxy-n3-protonated cytidine-5'-monophosphate 0.720 142 IY9 [5-(4-azanyl-2-oxidanylidene-pyrimidin-1-yl)-3-oxidanyl-furan-2-yl]methyl dihydrogen phosphate 0.720 143 L2B 3'-deoxyuridine-5'-monophosphate 0.720 144 ONE 1-(beta-D-ribofuranosyl)-pyridin-4-one-5'-phosphate 0.720 145 PYO 1-(beta-D-ribofuranosyl)-pyrimidin-2-one-5'-phosphate 0.720 146 TA3 (4s,5r)-3-(2-deoxy-5-O-phosphono-beta-D-erythro-pentofuranosyl)-5-methyl-1,3-diazabicyclo[2.2.0]hexan-2-one 0.720 147 UPS 2'-deoxy-5'-O-thiophosphonouridine 0.720 148 US1 2'-deoxy-3'-thiouridine 5'-(dihydrogen phosphate) 0.720 149 XC [(2~{R},3~{R},5~{R})-5-(6-azanyl-2-oxidanylidene-4,5-dihydropyrimidin-3-yl)-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphate 0.720 150 XY7 1-[2-deoxy-5-O-(dihydroxyphosphanyl)-2-fluoro-beta-L-ribofuranosyl]pyrimidine-2,4(1h,3h)-dione 0.720 151 125 2'-O-fluoroethyl-5-methyl-uridine-5'-monophosphate 0.714 152 2AT 2'-O-allyl thymidine-5'-monophosphate 0.714 153 2GT 2'-O-propargyl thymidine-5'-monophosphate 0.714 154 LCG [(1r,3r,4r,7s)-7-hydroxy-3-(guanin-9-yl)-2,5-dioxabicyclo[2.2.1]hept-1-yl]methyl dihydrogen phosphate 0.714 155 NCU [(1r,5r,7r,8s)-7-(4-amino-5-methyl-2-oxopyrimidin-1(2h)-yl)-8-hydroxy-3-methyl-2,6-dioxa-3-azabicyclo[3.2.1]oct-5-yl]methyl dihydrogen phosphate 0.714 156 P2T 2'-O-propyl thymidine-5-monophosphate 0.714 157 1CC 5-carboxy-2'-deoxycytidine monophosphate 0.704 158 5EJ 1-(2-deoxy-5-O-phosphono-beta-D-erythro-pentofuranosyl)-4-ethoxy-5-methylpyrimidin-2(1h)-one 0.704 159 5HM 5-(hydroxymethyl)cytidine 5'-(dihydrogen phosphate) 0.704 160 5PC 5(1-propynyl)-2'-deoxycytidine-5'-monophosphate 0.704 161 6CN 6-cyanouridine 5'-phosphate 0.704 162 A1IC1 [(2~{R},3~{R},4~{R},5~{R})-4-methoxy-5-[3-methyl-2,4-bis(oxidanylidene)pyrimidin-1-yl]-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphite 0.704 163 ATM 3'-azido-3'-deoxythymidine-5'-monophosphate 0.704 164 C36 5-methyl-5-fluoro-2'-deoxy-cytidine-5'-monophosphate 0.704 165 C49 4-thio,5-fluoro,5-methyl-2'-deoxy-cytidine-5'-monophosphate 0.704 166 EIX [(2r,3s,5s)-5-[(4r,5r)-6-azanyl-5-fluoranyl-5-methyl-2-oxidanylidene-4-sulfanyl-4h-pyrimidin-3-yl]-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphate 0.704 167 F3H 1,5-anhydro-2,3-dideoxy-3-fluoro-2-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2h)-yl)-6-O-phosphono-D-altritol 0.704 168 F4H 1,5-anhydro-2,3-dideoxy-3-fluoro-2-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2h)-yl)-6-O-phosphono-D-mannitol 0.704 169 FNU 6-amino-5-fluorouridine 5'-(dihydrogen phosphate) 0.704 170 HEU 3-(2-hydroxyethyl)-2'-deoxyuridine-5'-monophosphate 0.704 171 HHU [(2r,3s,4r,5r)-5-[2,4-bis(oxidanylidene)pyrimidin-1-yl]-4-formamido-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphate 0.704 172 JW5 6-(hydroxymethyl)uridine 5'-(dihydrogen phosphate) 0.704 173 NDN 2'-deoxy-5-nitrouridine 5'-(dihydrogen phosphate) 0.704 174 NDU 2'-deoxy-5-nitrouridine 5'-monophosphate 0.704 175 RSQ 5-formylcytidine 5'-(dihydrogen phosphate) 0.704 176 T23 2'-O-methyl-3'-methyl-3'-deoxy-arabinofuranosyl-thymine-5'-phosphate 0.704 177 U1P 6-[(E)-iminomethyl]uridine 5'-phosphate 0.704 178 UEP 6-ethyluridine 5'-phosphate 0.704 179 UFB 2'-f,4'-beta-ome uridine 5'-(dihydrogen phosphate) 0.704 180 UMO 2'-f-4'-ome U 0.704 181 UZR 2'-deoxy-2'-triaza-1,2-dien-2-ium-1-yl-uridine-5'-monophosphate 0.704 182 XFC 4-amino-1-(2-deoxy-2-fluoro-5-O-phosphono-beta-D-arabinofuranosyl)-2-oxo-1,2-dihydropyrimidine-5-carbaldehyde 0.704 183 OIQ [(1r,3r,4r,7s)-5-[(E)-N,N'-dimethylcarbamimidoyl]-3-[5-methyl-2,4-bis(oxidanylidene)pyrimidin-1-yl]-7-oxidanyl-2-oxa-5-azabicyclo[2.2.1]heptan-1-yl]methyl dihydrogen phosphate 0.700