Three growth inhibitors, for which the names batatasins I, II and III are proposed, occur in dormant yam bulbils. Application of these inhibitors suppresses the sprouting of bulbils, and the inhibition is reversible by low-temperature stratification. Batatasins I and III were isolated as crystals and partially characterized as phenotic compounds not identical with known inhibions.
Six new products of oxidation of indolyl-3-acetic acid catalyzed by horseradish peroxidase were isolated, along with four known ones, 3-hydroxymethyloxindole (1), 3-methyleneoxindole (2), indolyl-3-aldehyde (4), and 3,3-diindolylmethane (10). Based on spectroscopic and chemical evidence, the new products were identified as 3-acetoxyindole (3), 3-(indol-3-ylmethyl)oxindole (6), 3-[(2-indol-3-ylmethyl)indol-3-ylmethyl]oxindole (9), the 3-hydroxymethyl compounds of 6 and 9 (5 and 7), and 2-(indol-3-ylmethyl)indolyl-3-acetic acid (8), respectively.
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