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 (7R)-2-chloro-8-cyclopentyl-7-ethyl-5-methyl-7H-pteridin-6-one;(7R)-8-cyclopentyl-7-ethyl-5-methyl-2-(3-methylsulfonylphenyl)-7H-pteridin-6-one;(3-methylsulfonylphenyl)boronic acid .
user
C42H54BClN8O8S2
assistant