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-[2-(4-benzylcyclopenta-1,3-dien-1-yl)-[1,3]thiazolo[5,4-d][1,3]thiazol-5-yl]cyclopenta-1,3-dien-1-amine .
user
C21H17N3S2
assistant