Inhibitory Activity of (9R,10S,12Z)-9,10-Dihydroxy-8-oxo-octadecenoic Acid,Its C-9 Epimer and Their Derivatives toward the Growth of Tea Pollen Tubes

The inhibitory activity of (9R,10S,12Z)-9,10-dihydroxy-8-oxooctadecenoic acid and its diacetate, acetonide and methyl ester toward tea pollen tube growth were different, the inhibition by the diacetate being the strongest. Each compound of the fatty acid and its derivatives exhibited more inhibition than its C-9 epimer. The fatty acid and its C-9 epimer showed the same toxicity against HeLa cells.