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-[(2R,3R,4R)-4-(2-amino-6-methoxypurin-9-yl)-3,4-dihydroxyoxolan-2-yl]-2-methylbutan-2-yl]oxy-(2-hydroxybutan-2-yl)phosphinic acid .
user
C19H32N5O8P
assistant