by Freter, K R
Published in Pharmaceutical research (01.07.1988)

by Freter, K. R
Published in Canadian journal of chemistry (01.11.1967)

by Freter, K. R, Hess, F. K, Sygusch, J, Brisse, F
Published in Canadian journal of chemistry (15.10.1971)

by CARTER, C, FRETER, KR, KRIWACKI, RW, LEONARD, SF, PITNER, TP
Published in Journal of heterocyclic chemistry (01.03.1987)