Abstract: The invention provides a novel glycoside which contains as the aglycon a 4-(substituted phenyl)piperazine-1-yl derivative of glycyrrhetinic acid and 11-deoxo-glycyrrhetinic acid or their derivative as well as a composition for the treatment of virus infection, which contains these compounds as a main active component.

Abstract: There are given disclosures on a polyisoprene compound of the formula ##STR1## wherein Y is S, O, NH or ##STR2## .sub.l is an integer of 2-10, Z is a group of ##STR3## R.sup.1 and R.sup.2 are same or different and each means a hydrogen atom or an alkyl group having C.sub.1-4, m is an integer of 0 or 1, and .sub.n is an integer of 0, 1 or 2,a salt thereof, a process for the preparation of same, and use thereof.

Abstract: The invention relates to a hydantoin derivative, salt thereof, process for the preparation thereof, and medicine containing the derivative. The derivative is represented by the formula ##STR1## wherein M is --CONH--NHR.sup.1 group, --CONH--OR.sup.2 group, ##STR2## in which R.sup.1 is hydrogen atom, an alkyl group, an alkenyl group, a phenyl radical, a substituted phenyl group, a naphthyl radical, a substituted naphthyl group, a pyridyl radical, a furyl radical or a thienyl radical, R.sup.2 is a hydrogen atom, an alkyl group, a phenyl radical or a substituted phenyl group, R.sup.3 and R.sup.4 are the same or different independently, each being a phenyl radical, or an aralkyl group, or R.sup.3 may form a substituted or non-substituted C.sub.5-6 saturated heterocyclic ring together with R.sup.4 and a possible nitrogen or oxygen atom, R.sup.5 forms a substituted or non-substituted saturated heterocyclic ring together with R.sup.6 and a possible nitrogen or oxygen atom, R.sup.

Abstract: 7a-Nitromethyl-2,3,5,6,7,7a-hexahydro-1H-pyrrolizine of the formula ##STR1## and salts thereof, as well as processes for the preparation of the compound and 7a-aminomethyl-2,3,5,6,7,7a-hexahydro-1H-pyrrolizine and salts thereof.

Abstract: A process for the preparation of pyrrolizine derivatives of the formula ##STR1## wherein R is --CN or --CH.sub.2 NH.sub.2, and salts thereof.

Abstract: A glycyrrhetic acid derivative of the formula ##STR1## wherein X and Y are hydrogen atom, respectively or X is oxygen atom together with Y, A.sub.1 is methylene or carbonyl radical, A.sub.2 is hydrogen atom, cyano, carbamoyl, carboxyl radical or alkoxycarbonyl group, m and n are an integer, respectively, R.sub.1 is a radical of ##STR2## in which R.sub.2 is an alkyl, alkenyl group, phenyl radical or a substituted phenyl radical, A.sub.3 is S, O or NH, and l is an integer, a process for the preparation of the derivatives, and use of the derivative as a pharmaceutical agent.

Abstract: An organo-silicone compound of the formula ##STR1## wherein X is a methylene or carbonyl radical, Y is an NH or O, n is an integer, R.sub.1 is a hydrogen atom, halogen atom or alkyl group, R.sub.2, R.sub.3 and R.sub.4 are an alkyl group, alkoxy group, phenyl radical or substituted phenyl radical, respectively, and R.sub.5 is a hydrogen atom or a group of ##STR2## in which X, Y, n, R.sub.2, R.sub.3 and R.sub.4 have the meanings as referred to, and used as an anti-tumor agent or for use in anti-tumor compositions.

Abstract: Novel organo-silicone compounds represented by the formula, ##STR1## wherein R is hydrogen, halogen or alkyl group, R.sup.1, R.sup.2 and R.sup.3 are alkyl group, alkoxy group, phenyl radical, substituted phenyl radical, alkylcarbonyloxy group, or trialkylsilyloxy group, respectively, R.sup.4 is hydrogen, alkyl or alkenyl grup, and m and n are an integer, respectively but those do not represent same integer of 2, when all of R.sup.1, R.sup.2 and R.sup.3 represents methyl radical, a process for the manufacture of the compounds, and an anti-tumor agent which comprises as an effective component, at least one of the compounds.

Abstract: Novel pyrrolizidine compounds represented by the formula ##STR1## wherein R is a radical of ##STR2## R.sup.1 is hydrogen, halogen, alkyl group, alkoxy group, alkanoyl group, trifluoromethyl radical, trimethylsilyl radical or ##STR3## R.sup.2 and R.sup.3 are same or different and are hydrogen or alkyl group, respectively, R.sup.4 is hydrogen, halogen, alkyl group or alkoxy group and m is an integer of 0 to 5,salts thereof, a process for the preparation of same as well as a pharmaceutical agent comprising same.