You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by (3S,4R,5S)-3,4-dihydroxy-5-[(1S,2R,5R,7R,8R,10S,11S,14R,15S)-8-methoxy-2,15-dimethyl-14-pentacyclo[8.7.0.02,7.05,7.011,15]heptadecanyl]hexan-2-one ?
user
C26H42O4
assistant