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 [(1R,2R,4R,5S,7R,9Z,11S)-4-hydroxy-4,9-dimethyl-14-methylidene-8,13-dioxo-6,12-dioxatricyclo[9.3.0.05,7]tetradec-9-en-2-yl] 2-methylpropanoate ?
user
C19H24O7
assistant