You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl 2-[(1S,2R,4aR,5S,8aR)-1,5-dihydroxy-4a-methyl-8-methylidene-1,2,3,4,5,6,7,8a-octahydronaphthalen-2-yl]prop-2-enoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H24O4
assistant