DL-Tyrosine556-03-631 % similar Tyrosine60-18-431 % similar Droxidopa23651-95-831 % similar 3,5-Bis(trifluoromethyl)phenylalanine237076-69-631 % similar 3,5-Dibromo-L-tyrosine300-38-931 % similar 3',5'-Diiodo-L-tyrosine300-39-031 % similar 3,4-Difluoro-L-phenylalanine31105-90-531 % similar Dl-3,4-difluorophenylalanine32133-36-131 % similar 2-(Benzo[d]isoxazol-3-yl)-2-bromoacetic acid37924-67-731 % similar L-4-Pyridylalanine37535-49-230 % similar (αR)-α-Amino-4-pyridinepropanoic acid37535-50-530 % similar 3-Amino-L-tyrosine dihydrochloride23279-22-330 % similar L-Histidine hydrochloride (1:?)1007-42-730 % similar D-Histidine hydrochloride6341-24-830 % similar L-Histidine monohydrochloride645-35-230 % similar DL-Histidine hydrochloride6459-59-230 % similar