| 摘要 |
PCT No. PCT/GB96/00837 Sec. 371 Date Oct. 6, 1997 Sec. 102(e) Date Oct. 6, 1997 PCT Filed Apr. 4, 1996 PCT Pub. No. WO96/31576 PCT Pub. Date Oct. 10, 1996A compound of formula I wherein n=3-30; X and Y are independently chosen from C1-6 alkyl, phenyl or formula II: (CH2)pO-MII wherein p=1-20 and M is a group of formula III: wherein a, b and g are independently chosen from 0 and 1; G is selected from CO2, OCO and is a single bond when g=0; j=0-4; F indicates that one or more of the phenyl rings may be laterally fluorinated; Z is chosen from R, OR, CO2R, OCOR or CN wherein R is selected from chiral C4-20 branched chain alkyl, provided that at least one of X and Y is selected from formula II and that the positions of X and Y relative to each other provide stereo-isomers. |
