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 1-[(1S,2R)-2-(4-methyl-3-prop-1-en-2-ylpent-3-enyl)cyclohex-3-en-1-yl]prop-2-en-1-one ?
user
C18H26O
assistant