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 7-[(2R)-2,3-dihydroxypropyl]-3-methyl-8-[(2Z)-2-(pyridin-4-ylmethylidene)hydrazinyl]purine-2,6-dione .
user
C15H17N7O4
assistant