35394-49-1 Trichochrome B Trichosiderin B alpha-Amino-2-(8-(2-amino-2-carboxyethyl)-3-carboxy-5-hydroxy-2H-1,4-benzothiazin-2-ylidene)-3,4-dihydro-5-hydroxy-3-oxo-2H-1,4-benzothiazine-7-propanoic acid