You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl (1R,4S,5S,7S,12S)-7-hydroxy-4,10-dimethyl-8-oxotricyclo[5.3.2.01,5]dodec-9-ene-12-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H22O4
assistant