You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1R,3R,3aR,6aS)-1,2,3,3a,4,5,6,6a-octahydropentalene-1,3-dicarboxylic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C10H14O4
assistant