Abstract: A method for preparing a coordination complex of an isonitrile ligand and a radioisotope of Tc, Ru, Co, Pt, Re, Os, Ir, W, Re, Cr, Mo, Mn, Ni, Rh, Nb and Ta from a non-radioactive metal adduct of the isonitrite.

Abstract: Novel unsaturated ether derivatives of alkyl piperidine and pyrrolidine compounds, pharmaceutical compositions containing them, methods of preparation and methods of using these compounds as antipsychotic agents are disclosed.

Abstract: Compounds of Formula I have been shown to enhance the release of the neurotransmitter acetlcholine, and thus may be useful as chemical intermediates and as pharmacological agents in the treatment of diseases of man, such as in Alzheimer's Disease and other conditions involving learning and cognition, where subnormal levels of this neurochemical are found.

Abstract: There are provided novel 1,4 Diamine 2,3 Dihydroxybutanes useful as antiviral agents, pharmaceutical compositions containing them and processes for preparing such compounds.

Abstract: Cognitive defeciencies or neurological dysfunction in mammals are treated with .alpha.,.alpha.-disubstituted aromatic or heteroaromatic compounds. The compounds have the formula: ##STR1## or a salt thereof wherein X and Y are taken together to form a saturated or unsaturated carbocyclic or heterocyclic first ring and the shown carbon in said ring is .alpha. to at least one additional aromatic ring or heteroaromatic ring fused to the first ring;one of Het.sup.1 is 2, 3 or 4-pyridyl or 2, 4, or 5-pyrimidinyl and the other is selected from(a) 2, 3, or 4-pyridyl,(b) 2, 4, or 5-pyrimidinyl,(c) 2-pyrazinyl,(d) 3, or 4-pyridazinyl,(e) 3, or 4-pyrazolyl,(f) 2, or 3-tetrahydrofuranyl, and(g) 3-thienyl.