You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (3Z,5Z,7E,11Z,13Z,15Z,17E)-20-[(E)-hex-2-enyl]-9,10-dihydroxy-7,15-dimethyl-1-azacycloicosa-3,5,7,11,13,15,17-heptaen-2-one into molecular formula.
user
C27H37NO3
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