“…50,51 Phytochemical analysis of the active fraction from the bark of P. santalinus has indicated the presence of flavonoids, glycosides, and phenols. 52 In addition, the ethanolic extract of bark also showed the presence of an array of amino acids, including aspartic acid, glutamic acid, alanine, serine, glycine, threonine, lysine, asparagine, histidine, arginine, cystine, glutamine, proline, phenylalanine, and leucine. 53 The gum kino from the bark of P. santalinus provides nonglucosidal tannins, kino-tannic acid, kinonin (C 28 H 24 O 12 ), kinored (C 28 H 22 O 11 ), pyrocatechin, pyrocatechin acid, and small quantities of resin, pectin, and gallic acid.…”