You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule [(1S,2R,3aS,9aS)-5-methoxy-2-[(4-phenylcyclopent-2-en-1-ylidene)methoxy]-2,3,3a,4,9,9a-hexahydro-1H-cyclopenta[b]naphthalen-1-yl]methanol .
user
C27H30O3
assistant