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 methyl 2-[2-(1,3,5-trimethylpyrazol-4-yl)acetyl]-1,3,4,5-tetrahydropyrido[4,3-b]indole-6-carboxylate .
user
C21H24N4O3
assistant