0  B12R0.43  O=C(O)CC(C(=O)O)C(O)C(=O)[O-] BBC/550 [0,1,0,0,1,0|2,0,0]=4
1  B12R0.41  NC(=O)CN(CC(=O)O)CC(=O)O BBC/304 [0,0,0,0,1,1|2,0,0]=4