RDKit 2D 3 2 0 0 0 0 0 0 0 0999 V2000 -0.0000 -0.5000 0.0000 C 0 0 0 0 0 0 0 0 0 0 0 0 -1.2990 0.2500 0.0000 C 0 0 0 0 0 0 0 0 0 0 0 0 1.2990 0.2500 0.0000 R 0 0 0 0 0 1 0 0 0 0 0 0 1 2 1 0 1 3 1 0 M END