- Effect of 3,4-trans-2,2-dimethyl-3-phenyl-4-P-(beta-pyrrolidinoethoxy) phenyl -7-methoxy chroman (centchroman) on the biochemistry of the fallopian tube and uterus of rhesus monkeys (Macaca mulatta). Imam, S.K., Srivastava, K., Dasgupta, P.R., Kar, A.B. Contraception. (1975)