Tyrosinium-d-tetrahydroisoquinoline-3-carboxylate 1.5-Hydrate and Tyrosyl-d-tetrahydroisoquinoline-3-carboxamide Hydrate

Crystals of the two dipeptide title compounds, Tyr-D-Tic, C19H20N2O4.1.5H2O, and Tyr-D-Tic-NH2, C19H21N3O3.H2O, were prepared by the sitting-drop method. Tyr-D-Tic is orthorhombic (P2(1)2(1)2(1)) and crystallizes as a zwitterion. The asymmetric unit contains two peptide molecules and three molecules...

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