You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (2R)-N-cyclopropyl-2-(2-methyl-6,8-dihydro-5H-pyrido[3,4-d]pyrimidin-7-yl)-2-phenylacetamide .
user
C19H22N4O
assistant