You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (4aS,6E,7aR)-6-[(2-chlorophenyl)methylidene]-3-(cyclopropylmethyl)-4a,9-dihydroxy-1,2,4,5,7a,13-hexahydro-4,12-methanobenzofuro[3,2-e]isoquinolin-7-one .
user
C27H26ClNO4
assistant