You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance methyl 2-[(3S,3aS,5aS,6S,7S,9aR,9bS)-3-acetyloxy-3a,6-dimethyl-7-(2-oxobutyl)-2,3,4,5,5a,7,8,9,9a,9b-decahydro-1H-cyclopenta[a]naphthalen-6-yl]acetate .
user
C24H38O5
assistant