You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (2R,3S,5R)-5-(6-aminopurin-9-yl)-2-[[oxido-[(4-prop-1-en-2-ylcyclohexen-1-yl)methoxy]-sulfidophosphaniumyl]oxymethyl]oxolan-3-ol .
user
C20H27N5O5PS-
assistant