methyl (33R,35S,91R,92R,5S,Z)-5-(tert-butyl)-17-methoxy-4,7-dioxo-2,8-dioxa-6-aza-1(2,3)-quinoxalina-3(3,1)-pyrrolidina-9(1,2)-cyclopropanacyclotetradecaphan-12-yne-35-carboxylate CAS NO.1425038-23-8

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