1 PM6 9h-purine-6-thiol 1.000 2 DX4 2-amino-1,9-dihydro-6h-purine-6-thione 0.909 3 XQG 6-methylsulfanyl-9h-purine 0.909 4 WUT 9~{H}-purine 0.900 5 A1IBK 2-azanyl-8-methyl-3,7-dihydropurine-6-thione 0.833 6 2BP 9h-purin-2-amine 0.818 7 6MP 6-methylpurine 0.818 8 ADE Adenine 0.818 9 BP1 6-bromo-7h-purine 0.818 10 ES4 6-chloro-9h-purine 0.818 11 06K 2,6-bis(chloranyl)-7h-purine 0.750 12 290 6-methyl-3,9-dihydro-2h-purin-2-one 0.750 13 2ON 2-sulfanyl-1,9-dihydro-6h-purin-6-one 0.750 14 3MA 6-amino-3-methylpurine 0.750 15 6AP 9h-purine-2,6-diamine 0.750 16 6GU 6-chloroguanine 0.750 17 8G8 2-chloranyl-9-methyl-purine 0.750 18 A2F 2-fluoroadenine 0.750 19 ADK 3-methyl-3h-purin-6-ylamine 0.750 20 ADZ 9-methyl-9h-purin-6-amine 0.750 21 BCP 2-bromo-6-chloro-purine 0.750 22 BOA 2-bromo-6-hydroxy-purine 0.750 23 CFP 6-chloro-2-fluoropurine 0.750 24 GUN Guanine 0.750 25 HH5 6-iodanyl-7~{H}-purin-2-amine 0.750 26 IGA 6-amino-3,7-dihydro-2h-purin-2-one 0.750 27 KB5 6-azanyl-9~{H}-purine-8-thiol 0.750 28 M1A 6-amino-1-methylpurine 0.750 29 N6M N-methyl-9h-purin-6-amine 0.750 30 Q88 9h-purine-6,8-diamine 0.750 31 SZL 6-methoxy-9h-purine 0.750 32 XAN Xanthine 0.750 33 YH7 6-amino-1,9-dihydro-2h-purine-2-thione 0.750 34 WOY 6,7-dihydro-5h-pyrrolo[2,3-D]pyrimidine 0.727 35 A1IBL 2-azanyl-8-propyl-3,7-dihydropurine-6-thione 0.714 36 KBN 2-(trifluoromethyl)-9~{H}-purine-6-thiol 0.714