5-Undecenedioic acid, 2,10-diamino-6-(4-(2-amino-2-carboxyethyl)-1H-imidazol-1-yl)-5-(((5-amino-5-carboxy-2-hydroxypentyl)imino)methyl)- 58402-48-5 Dehydrohistidinohydroxymerodesmosine Dhhm-desmosine