eMal	SC(C(C(O)=O)CC)=O
Mal	SC(CC(O)=O)=O
mMal	SC(C(C)C(O)=O)=O
mxMal	SC(C(C(O)=O)OC)=O
2S-mBut	SC(=O)[C@@H](C)CC
2R-mBut	SC(=O)[C@H](C)CC