RDKit 2D 3 2 0 0 0 0 0 0 0 0999 V2000 -1.2990 -0.2500 0.0000 O 0 0 0 0 0 0 0 0 0 0 0 0 0.0000 0.5000 0.0000 S 0 0 0 0 0 0 0 0 0 0 0 0 1.2990 -0.2500 0.0000 O 0 0 0 0 0 0 0 0 0 0 0 0 1 2 2 0 2 3 2 0 M END