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 (NZ)-N-[2-amino-9-(2,6-dimethoxyphenyl)-6-methyl-4,8,9,10-tetrahydro-3H-1-benzazocin-7-ylidene]hydroxylamine .
user
C20H25N3O3
assistant