0  B8R0.23  NC(=O)C[C@H](N)C(=O)O DB00174 [1,0,0,0,0,0|3,0,0]=4
1  B8R0.23  N[C@@H](CC(=O)O)C(=O)O DB00128 [1,0,0,0,0,0|3,0,0]=4
2  B7R0.6  O=C(O)CCC(=O)O DB00139 [2,0,0,0,0,0|2,0,0]=4