| 摘要 |
A compound having formula (PhC)Ar(GR) wherein Ph represents a phenyl group Ar is an aromatic ring system having from six to twenty carbon atoms; G is O S SO or SO; R is: (a) C C alkyl substituted by at least one of OH SH C C alkoxy and cyano; or (b) C C heteroalkyl; m is one or two; and n is an integer from one to four. |
