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 7-[(4-phenylthiophen-2-yl)methyl]-2-(trifluoromethyl)-6,8-dihydro-5H-pyrido[3,4-d]pyrimidine .
user
C19H16F3N3S
assistant