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 4-(4-ethylpiperazin-1-yl)-5-methyl-N-(2-morpholin-4-ylethyl)thieno[2,3-d]pyrimidine-6-carboxamide .
user
C20H30N6O2S
assistant