Not Less Than - 95%
6,7,9,10-Tetrahydro-alpha,beta-dihydroxy-gamma-oxo-6,10-methano-8H-pyrazino[2,3-h][3]benzazepine-8-butanoic acid;6,10-Methano-8H-pyrazino[2,3-h][3]benzazepine-8-butanoic acid, 6,7,9,10-tetrahydro-alpha,beta-dihydroxy-gamma-oxo