You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3aS,6aR)-6-ethyl-3-methyl-3,4,5,6-tetrahydro-2H-cyclopenta[b]furan-3a,6a-diamine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C10H20N2O
assistant