Journal of the American Chemical Society, , vol. 66, p. 1244 Yakugaku Zasshi, , vol. 68, p. 245 Chem.Abstr., , p. 3962 Yakugaku Kenkyu, , vol. 20, p. 85 Chem.Abstr., , p. 5681 DE834992 , ; DRP/DRBP Org.Chem.