D-Luciferin (Free acid) 5G. D-Luciferin (Free acid), CAS: 2591-17-5, MF: C11H8N2O3S2, Purity: greater than or equal to 98%, Appearance: White to light yellow solid, Synonym: (S)-2-(6-Hydroxy-2-benzothiazolyl)-2-thiazoline-4-carboxylic acid, 4, 5-Dihydro-2-(6-hydroxy-2-benzothiazolyl)-, Size: 5G