(2RS)-2-Amino-3-hydroxy-N′,N′-bis[(2,3,4-trihydroxyphenyl)methyl]propanehydrazide;(2RS)-2-Amino-3-hydroxy-2′,2′-bis(2,3,4-trihydroxybenzyl) propanohydrazide; 2-Amino-3-hydroxy-N',N'-bis(2,3,4-trihydroxybenzyl)propanehydrazide;