RDKit 2D 2 1 0 0 0 0 0 0 0 0999 V2000 0.0000 0.7500 0.0000 N 0 0 0 0 0 0 0 0 0 0 0 0 -0.0000 -0.7500 0.0000 N 0 0 0 0 0 0 0 0 0 0 0 0 1 2 3 0 M END