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 (3aR,6R,7S,7aR)-6-(hydroxymethyl)-2,2-dimethyl-7-phenylmethoxy-3a,4,7,7a-tetrahydro-[1,3]dioxolo[4,5-c]pyran-6-carbonitrile .
user
C17H21NO5
assistant