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 (1S,2R,3S,4R,5S,6S,7R,8R)-4-ethynylpentacyclo[4.4.0.02,4.03,8.05,7]decan-9-one ?
user
C12H10O
assistant