You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name (2R)-2,6-diamino-N-[(2R,3S,4R,5S)-5-(6-aminopurin-9-yl)-4-hydroxy-2-(hydroxymethyl)oxolan-3-yl]hexanamide ?
user
C16H26N8O4
assistant