STRUCTURE OF TYRIVERDIN, THE IMMEDIATE PRECURSOR OF TYRIAN PURPLE

Article abstract of DOI:10.1246/cl.1980.631

Stereoisomeric tyriverdins A and B were isolated from Thais clavigera.The former, which is identical with tyriverdin isolated by Baker, was confirmed by 13C-NMR spectrum to be 2,2'-bis(methylthio)-6,6'-dibromo-2,2'-diindoxyl.None of these compounds are detected in the gastropod, suggesting that they are formed during the isolation process probably from tyrindoxyl sulfate, a genuine constituent.