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 (1R,4aS)-1,4a-dimethyl-7-propan-2-yl-2,3,4,9,10,10a-hexahydrophenanthrene-1-carboxylic acid;(1R,4aS)-1,4a-dimethyl-7-propan-2-yl-2,3,4,5,6,9,10,10a-octahydrophenanthrene-1-carboxylic acid;(1R,4aR)-1,4a-dimethyl-7-propan-2-yl-2,3,4,4b,5,6,10,10a-octahydrophenanthrene-1-carboxylic acid;(1R,4aR)-1,4a-dimethyl-7-propan-2-yl-2,3,4,4b,5,9,10,10a-octahydrophenanthrene-1-carboxylic acid;(1R,4aR)-1,4a-dimethyl-7-propan-2-ylidene-3,4,4b,5,6,9,10,10a-octahydro-2H-phenanthrene-1-carboxylic acid;(1R,4aR)-7-ethenyl-1,4a,7-trimethyl-3,4,4b,5,6,9,10,10a-octahydro-2H-phenanthrene-1-carboxylic acid .
user
C120H178O12
assistant