ere one of R1, R2 or R3 is a phenyl group, the total of carbon...http://www.google.com/patents/US5206323?utm_source=gb-gplus-sharePatent US5206323 - Silyl derivatives of eugenolAdvanced Patent SearchPublication numberUS5206323 APublication typeGrantApplication numberUS 07/801,134Publication dateApr 27, 1993Filing dateDec 2, 1991Priority dateJul 5, 1989Fee statusLapsedPublication number07801134, 80