You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by 5-N-[4-(4-ethylphenyl)-1,3-thiazol-2-yl]-2-phenyl-3,4-dihydropyrazole-3,5-dicarboxamide ?
user
C22H21N5O2S
assistant