title: l-Tyrosine isopropyl ester.
abstract: The title compound, C(12)H(17)NO(3), adopts a folded conformation with a C-C(NH(2))-C(=O)-O torsion angle of -95.9 (2)°. In the crystal, mol-ecules are linked by an O-H⋯N hydrogen bond, forming helical chains along the b-axis direction. Weak N-H⋯O and C-H⋯O hydrogen bonds are observed between the chains.
authors.affiliation: Universidad Nacional de Colombia, Sede Bogotá, Facultad de Ciencias, Departamento de Química, Cra 30 No. 45-03, Bogotá, 4-72  Colombia.
authors.forename: Nelson
authors.initials: N
authors.lastname: Nuñez-Dallos
authors.forename: Klaus
authors.initials: K
authors.lastname: Wurst
authors.forename: Rodolfo
authors.initials: R
authors.lastname: Quevedo