Structure and molecular orbital study of ergoline derivatives. 1-(6-Methyl-8 beta-ergolinylmethyl)imidazolidine-2,4-dione (I) and 2-(10-methoxy-1,6-dimethyl-8 beta-ergolinyl)ethyl 3,5-dimethyl-1H-2-pyrrolecarboxylate toluene hemisolvate (II) and comparison with nicergoline (III)
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(I): C19H22N4O2 (Registry No. 95688-34-9), m.p. greater than 573 K, Mr = 338.4, orthorhombic, P2(1)2(1)2(1), a = 8.392 (2), b = 13.004 (2), c = 15.676 (5) A, V = 1710.7 (7) A3, Z = 4, Dx = 1.31 Mg m-3, Mo Ka radiation, lambda = 0.71069 A, mu = 0.08 mm-1, F(000... ...
