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 (3R,6aR)-3-(2-methylpent-4-en-2-yl)-4-(4-phenylbut-1-ynyl)-1,3,6,6a-tetrahydrocyclopenta[c]furan-5-one ?
user
C23H26O2
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