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 [(2S,3R,4S,5S)-2-[[(4S,6S,6aR,9S)-1-hydroxy-3,6,9-trimethyl-4-(2-methylprop-1-enyl)-5,6,6a,7,8,9-hexahydro-4H-phenalen-2-yl]oxy]-3,5-dihydroxyoxan-4-yl] acetate .
user
C27H38O7
assistant