methyl (13S,15R,17S)-17-ethyl-13-[(5R,6R,7S,16R,19R)-5-ethyl-6,7-dihydroxy-12-methoxy-7-(methoxycarbonyl)-9-methyl-1,9-diazapentacyclo[14.2.1.05,19.08,16.010,15]nonadeca-3,10(15),11,13-tetraen-13-yl]-17-hydroxy-1,11-diazatetracyclo[13.3.1.05,10.04,12]nonadeca-4(12),5(6),7,9-tetraene-13-carboxylate