You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[9-[(6'S,6aS,6bS,7'aR,9R,11aS,11bR)-3-hydroxy-6',10,11b-trimethylspiro[2,3,4,6,6a,6b,7,8,11,11a-decahydro-1H-benzo[a]fluorene-9,2'-3,3a,5,6,7,7a-hexahydrofuro[3,2-b]pyridine]-4'-yl]-6-oxononyl]benzamide into its molecular formula.
user
C42H60N2O4
assistant