Urocanic acid 是产生于哺乳动物皮肤上层的主要光线受体，天然以反式尿刊酸存在，

Urocanic acid, produced in the upper layers of mammalian skin, is a major absorber of ultraviolet radiation.

Urocanic acid is formed in the upper layers of the epidermis where filaggrin, a histidine-rich filamentous protein produced after caspase-14 cleavage of profilaggrin, is broken down by proteinases into component amino acids[1].

104-98-3

C6H6N2O2

138.126

尿刊酸;4-Imidazoleacrylic acid;Urocanic acid

DMSO:10 mM
Powder: -20°C for 3 years
In solvent: -80°C for 2 years