You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2-[[4-(3-chloro-4-methylphenyl)-1,3-thiazol-2-yl]amino]-6-nitro-3,4-dihydro-1H-isoquinoline-3-carboxylic acid .
user
C20H17ClN4O4S
assistant