| 摘要 |
The present invention provides an anti-oxidant composition comprising a cyclic compound having formula I or a derivative thereof, wherein R<1 >and R<2 >are indepednetly selected from -OH, =O, wherein R<3 >is a substituent comprising an -OH group; and wherein R<4 >and R<5 >are other than H; with the proviso that the compound is other than ascorbic acid. |
