You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 7-(dimethylamino)-3,4-dihydro-2H-phenanthren-1-one into SMILES representation.
user
CN(C)C1=CC=C2C3=C(C=CC2=C1)C(=O)CCC3
assistant