You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (1R,2R,4S,7S,8S,11R,12R,17R)-7-(furan-3-yl)-17-hydroxy-1,8,12,16,16-pentamethyl-3,6-dioxapentacyclo[9.8.0.02,4.02,8.012,17]nonadec-13-ene-5,15,19-trione ?
user
C26H30O7
assistant