Isobutyl Ricinoleate

1-Naphthalenepropanol, \a-ethenyldecahydro-4-hydroxy\a-,5,5,8a-tetramethyl-2-methylene-, (\a-.S,1S,4S,4aS,8aR)-,9-Octadecenoic acid, 12-hydroxy-, 2-methylpropyl ester,