Abstract
The heartwood of Pterocarpus santalinus contains two major red pigments, santalin-A and santalin-B which are partial methyl ethers of the same polyphenol (santalin). For locating the position of the methoxyl groups, alkali fission and permanganate oxidation of the mixed ethyl methyl ethers are the most convenient. By this method santalin-A has been shown to be 9,1O,12- tri- O-methylsantalin and santalin-B, 9,10,12,4′-tetra- O-methylsantalin.
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