5-((1-(((19R)-10,19-DIETHYL-19-HYDROXY-14,18-DIOXO-17-OXA-3,13-DIAZAPENTACYCLO(11.8.0.02,11.04,9.015,20)HENICOSA-1(21),2,4(9),5,7,10,15(20)-HEPTAEN-7-YL)OXYCARBONYL)PIPERIDIN-4-YL)AMINO)PENTANOIC ACID
5-((1-(((19r)-10,19-diethyl-19-hydroxy-14,18-dioxo-17-oxa-3,13-diazapentacyclo(11.8.0.02,11.04,9.015,20)henicosa-1(21),2,4(9),5,7,10,15(20)-heptaen-7-yl)oxycarbonyl)piperidin-4-yl)amino)pentanoic acid