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-(butan-2-ylamino)-2-oxoethyl] 3-methyl-1-[(4-methylphenyl)methyl]thieno[2,3-c]pyrazole-5-carboxylate ?
user
C21H25N3O3S
assistant