You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2Z)-2-[5-hydroxy-3a,6-dimethyl-6-[(Z)-prop-1-enyl]-3-(2-pyridin-2-ylsulfanylacetyl)-1,2,3,4,5,5a,8,9,9a,9b-decahydrocyclopenta[a]naphthalen-7-ylidene]acetaldehyde is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H35NO3S
assistant