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 (4R)-6-methyl-N-(2-propan-2-ylphenyl)-2-sulfanylidene-4-thiophen-2-yl-3,4-dihydro-1H-pyrimidine-5-carboxamide .
user
C19H21N3OS2
assistant