Manmade A, Herlihy P, Quick J, Duffley R P, Burgos M, Hoffer A P
Experientia. 1983 Nov 15;39(11):1276-7. doi: 10.1007/BF01990368.
Three isomeric hemigossypol derivatives (3,4,5) have been synthesized. Two of these derivatives (3,4) and one synthetic intermediate (7) have been shown to have activity comparable to gossypol (1) in a sperm motility assay.