You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the SMILES notation of the molecule 3-[(4-chlorophenyl)methyl]-5-phenyl-2,5-dihydro-1H-1,2,4-triazin-6-one ?
user
O=C1NNC(CC2=CC=C(Cl)C=C2)=NC1C1=CC=CC=C1
assistant