You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 2-[[1-[3-(dimethylamino)propyl]-2-oxo-5,6,7,8-tetrahydroquinazolin-4-yl]sulfanyl]-N-propan-2-ylacetamide ?
user
C18H30N4O2S
assistant