Sempervirine nitrate , a specific molecular inhibitor of Mdm2, to MEF cells abrogated Period 2 ubiquitination leading to the accumulation of a stable pool of Period 2.

Corypalmine is a kind of alkaloid from Coptis chinensis and purple chinensis, which has inhibitory effect on the germination of plant pathogenic spores and saprophytic fungi.

S5A1 is a synthetic steroid used in the study of diabetes.