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 identified by methyl (1R,9R,10S,11R,12R,19R)-11-acetyloxy-12-ethyl-8-formyl-10-hydroxy-5-methoxy-4-[(5S,7S)-7-methoxycarbonyl-5-(2-oxobutyl)-2,3,4,5,6,8-hexahydro-1H-azonino[5,4-b]indol-7-yl]-8,16-diazapentacyclo[10.6.1.01,9.02,7.016,19]nonadeca-2,4,6,13-tetraene-10-carboxylate ?
user
C45H54N4O10
assistant