methyl (13S,15R)-13-[(1R,2R,3S,4R,12R,19R)-2-acetoxy-1-ethyl-3-hydroxy-8-methoxy-3-(methoxycarbonyl)-5-methyl-5,15-diazapentacyclo[10.6.1.015,19.04,12.06,11]nonadeca-6(11),7,9,17-tetraen-9-yl]-17-ethyl-1,11-diazatetracyclo[13.3.1.05,10.04,12]nonadeca-4(12),5(6),7,9,16-pentaene-13-carboxylate