You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(6R,6aR)-4-methylsulfonyl-1-(2-morpholin-4-ylacetyl)-6-propyl-6,6a-dihydro-2H-pyrrolo[3,2-b]pyrrol-5-one;hydrochloride is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H26ClN3O5S
assistant