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-N-(2-aminophenyl)-5-N-[4-(3-ethynylanilino)-8,8a-dihydroquinazolin-6-yl]thiophene-2,5-dicarboxamide ?
user
C28H22N6O2S
assistant