You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[[(2R)-1-(6-aminopurin-9-yl)propan-2-yl]oxymethyl-[(1-cyclopentyloxy-1-oxopropan-2-yl)amino]phosphoryl]amino]-2-methylpropanoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H34N7O6P
assistant