D. Hz1h, 26 (3H, s, N-Methyl) 2.08 (1H, br s, H-9), 2.21(1H, m, H a -12) & 1.14 (1H, m,H b -12), 2.01 (1H, m, H a -11) &1.53 (1H, m,H b -11, pp.32-174

. Hz, 57 ( 1H, d, J = 18.1 Hz, H b -15, p.55

J. =. Hz, 10 (1H, s, H a -30), 4.85 (1H, s, H b -30), 3.87(4H, m, piperazine H-3, p.6990

D. Hz, J. =1h, and J. =. Dd, 9 Hz, H a -15, pp.67-69

. Hz, 66(4H, m, piperazine H-2, p.17