You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by (1S,2R,3S,6R)-6-[7-[(1-ethylpyrrolidin-2-yl)methylamino]-5-propylsulfanyltriazolo[4,5-d]pyrimidin-3-yl]cyclohex-4-ene-1,2,3-triol ?
user
C20H31N7O3S
assistant