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 1-[(3,4-dichlorophenyl)methyl]-2-hydroxy-8-(3-hydroxypropylamino)-3-(methoxymethyl)-7-methyl-2H-purin-6-one .
user
C18H23Cl2N5O4
assistant