You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (1R,3aR,5aR,5bR,7aR,11aR,11bS,13aR,13bR)-3a,5a,5b,8,8,11a-hexamethyl-1-prop-1-en-2-yl-2,3,4,5,6,7,7a,11b,12,13,13a,13b-dodecahydro-1H-cyclopenta[a]chrysen-9-one by IUPAC nomenclature, provide its molecular formula.
user
C30H46O
assistant