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 (3R)-3-(2-chloro-1,3-thiazol-5-yl)-8-methyl-5-oxo-6-phenyl-2,3-dihydro-[1,3]thiazolo[3,2-a]pyrimidin-8-ium-7-carboxylic acid .
user
C17H13ClN3O3S2+
assistant