... References. 1); C. Mercier and G. Mignani, Rhône-Poulenc, French patent, R 89-08-317, (06.22.89). 2); O. Isler; CarotenoidsBirkaüser Verlag, Basel, Switzerland (1971). 3); (a) I. Minami, M. Nisar, M. Yuhara, I. Shimizu, J. Tsuji; ... b) G. Mignani, C. Chevalier, F. Grass, G. Allmang, D. Morel; Tetrahedron Lett., 31 (1990), p. 5161 and references cited therein. 6); Mixture 2 and 3 : bp 125–127°C/0.5 mmHg. Mixture 4 and 5 : bp 217–218°C/20 mmHg. ...