. . . . . . . "experimental"@en . . . "Bernd Fabry, Robert Piorr, Frank Clasen, Horst Ritterbex, Hans Bornmann, \"Process for the preparation of reaction products of epoxidized ricinoleic acid glycerides with sulfur trioxide.\" U.S. Patent US4981617, issued December, 1966."@en . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Ricinoleic Acid"@en . . "141-22-0"@en . . .