134354-67-9 BRN 4180087 Glycine, N-(1,5-anhydro-2,4-dideoxy-3-C-methyl-L-threo-pentitol-2-yl)- N-(1,5-Anhydro-2,4-dideoxy-3-C-methyl-L-threo-pentitol-2-yl)glycine