You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule formyloxymethyl (2S,5R,6R)-6-[[2-amino-2-(1,3-benzodioxol-4-yl)acetyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate ?
user
C19H21N3O8S
assistant