You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule methyl (1R,9R,10S,11R,12R,19R)-11-acetyloxy-12-ethyl-10-hydroxy-4-[(13R,15R,17R)-17-hydroxy-13-methoxycarbonyl-17-methyl-1,11-diazatetracyclo[13.3.1.04,12.05,10]nonadeca-4(12),5,7,9-tetraen-13-yl]-5-methoxy-8-methyl-8,16-diazapentacyclo[10.6.1.01,9.02,7.016,19]nonadeca-2,4,6,13-tetraene-10-carboxylate ?
user
C45H56N4O9
assistant