SMILES: C[C@H](CN1CCN(CCN(CCN(CC1)CC(=O)O)CC(=O)O)CC(=O)O)O
Description: The molecule is an optically active tricarboxylic acid that consists of 1,4,7,10-tetraazacyclododecane bearing three carboxymethyl substituents at positions 1, 4 and 7 as well as an (R)-2-hydroxypropyl group at position 10.