1 3GT (3beta,4beta,5beta,10beta,11e,13e)-maytansine 1.000 2 XQ4 (1s,2r,3s,5s,6s,16e,18e,20r,21s)-11-chloro-21-hydroxy-12,20-dimethoxy-2,5,9,16-tetramethyl-8,23-dioxo-4,24-dioxa-9,22-diazatetracyclo[19.3.1.1~10,14~.0~3,5~]hexacosa-10(26),11,13,16,18-pentaen-6-yl (2s)-2-{methyl[3-(methylamino)propanoyl]amino}propanoate (non-preferred name) 0.941 3 BKX (1s,2r,3r,5r,6r,16e,18e,20r,21s)-11-chloro-21-hydroxy-12,20-dimethoxy-2,5,9,16-tetramethyl-8,23-dioxo-4,24-dioxa-9,22-diazatetracyclo[19.3.1.1~10,14~.0~3,5~]hexacosa-10(26),11,13,16,18-pentaen-6-yl (2s)-2-{methyl[3-(methyldisulfanyl)propanoyl]amino}propanoate (non-preferred name) 0.923 4 HZ0 (10e,12e)-86-chloro-14-hydroxy-85,14-dimethoxy-33,2,7,10-tetramethyl-12,6-dioxo-7-aza-1(6,4)-oxazinana-3(2,3)-oxirana-8(1,3)-benzenacyclotetradecaphane-10,12-dien-4-yl N-methyl-N-(3-(methylsulfinothioyl)propanoyl)-D-alaninate 0.923 5 BKU (1s,2s,3s,5r,6s,16e,18e,20s,21r)-11-chloro-21-hydroxy-12,20-dimethoxy-2,5,9,16-tetramethyl-8,23-dioxo-4,24-dioxa-9,22-diazatetracyclo[19.3.1.1~10,14~.0~3,5~]hexacosa-10(26),11,13,16,18-pentaen-6-yl (2s)-2-{methyl[3-methyl-3-(methyldisulfanyl)butanoyl]amino}propanoate (non-preferred name) 0.889 6 BKF (1s,2s,3s,5s,6s,16z,18z,20r,21s)-11-chloro-21-hydroxy-12,20-dimethoxy-2,5,9,16-tetramethyl-8,23-dioxo-4,24-dioxa-9,22-diazatetracyclo[19.3.1.1~10,14~.0~3,5~]hexacosa-10(26),11,13,16,18-pentaen-6-yl 2-methylpropanoate 0.878 7 5IJ (1s,2r,3s,5s,6s,16e,18e,20r,21s)-11-chloro-21-hydroxy-12,20-dimethoxy-2,5,9,16-tetramethyl-8,23-dioxo-4,24-dioxa-9,22-diazatetracyclo[19.3.1.1~10,14~.0~3,5~]hexacosa-10(26),11,13,16,18-pentaen-6-yl acetate 0.875 8 Q0F [(1~{R},2~{R},3~{S},5~{S},6~{S},16~{E},18~{E},20~{R},21~{S})-11-chloranyl-12,20-dimethoxy-2,5,9,16-tetramethyl-21-oxidanyl-8,23-bis(oxidanylidene)-4,24-dioxa-9,22-diazatetracyclo[19.3.1.1^{10,14}.0^{3,5}]hexacosa-10(26),11,13,16,18-pentaen-6-yl] pent-4-enoate 0.860 9 5KI (1s,2r,3s,5s,6s,16e,18e,20r)-11-chloro-12,20-dimethoxy-2,5,9,16-tetramethyl-8,23-dioxo-4,24-dioxa-9,22-diazatetracyclo[19.3.1.1~10,14~.0~3,5~]hexacosa-10(26),11,13,16,18,21(25)-hexaen-6-yl acetate 0.854 10 5JH (1r,2r,3s,5s,6s,16e,18e,20r,21s)-11-chloro-21-hydroxy-12,20-dimethoxy-2,5,9,16-tetramethyl-8,23-dioxo-4,24-dioxa-9,22-diazatetracyclo[19.3.1.1~10,14~.0~3,5~]hexacosa-10(26),11,13,16,18-pentaen-6-yl heptanoate 0.827 11 5L5 (1s,2r,3s,5s,6s,16e,18e,20r)-11-chloro-12,20-dimethoxy-2,5,9,16-tetramethyl-8,23-dioxo-4,24-dioxa-9,22-diazatetracyclo[19.3.1.1~10,14~.0~3,5~]hexacosa-10(26),11,13,16,18,21-hexaen-6-yl hept-6-ynoate 0.808 12 5IX (1s,2r,3s,5s,6s,16e,18e,20r,21s)-11-chloro-21-hydroxy-12,20-dimethoxy-2,5,9,16-tetramethyl-8,23-dioxo-4,24-dioxa-9,22-diazatetracyclo[19.3.1.1~10,14~.0~3,5~]hexacosa-10(26),11,13,16,18-pentaen-6-yl phenylacetate 0.778 13 BKL (1r,2s,3s,5s,6s,16e,18e,20r,21s)-11-chloro-6,21-dihydroxy-12,20-dimethoxy-2,5,9,16-tetramethyl-4,24-dioxa-9,22-diazatetracyclo[19.3.1.1~10,14~.0~3,5~]hexacosa-10(26),11,13,16,18-pentaene-8,23-dione 0.776 14 5JS (1s,2r,3s,5s,6s,16e,18e,20r)-11-chloro-12,20-dimethoxy-2,5,9,16-tetramethyl-8,23-dioxo-4,24-dioxa-9,22-diazatetracyclo[19.3.1.1~10,14~.0~3,5~]hexacosa-10(26),11,13,16,18,21-hexaen-6-yl phenylacetate 0.759 15 5IS (1s,2r,3s,5s,6s,16e,18e,20r)-11-chloro-6-hydroxy-12,20-dimethoxy-2,5,9,16-tetramethyl-4,24-dioxa-9,22-diazatetracyclo[19.3.1.1~10,14~.0~3,5~]hexacosa-10(26),11,13,16,18,21-hexaene-8,23-dione 0.755 16 PX0 (~{z})-11-[[(1~{R},2~{R},3~{S},5~{S},6~{S},16~{E},18~{E},20~{R},21~{S})-11-chloranyl-12,20-dimethoxy-2,5,9,16-tetramethyl-21-oxidanyl-8,23-bis(oxidanylidene)-4,24-dioxa-9,22-diazatetracyclo[19.3.1.1^{10,14}.0^{3,5}]hexacosa-10(26),11,13,16,18-pentaen-6-yl]oxy]-11-oxidanylidene-undec-2-enoic acid 0.741