Abstract: An immuno-suppressive agent containing, as an effective component, an, enopyranose derivative of the following formula (I) or its salt: ##STR1## wherein R.sup.1 is a hydrogen atom, alkyl which may be substituted, alkenyl, alkynyl, --OSO.sub.2 R.sup.7, a halogen atom, --OCOR.sup.7, --NHCOR.sup.8, alkoxy, phenyl which may be substituted or a saccharose residue, R.sup.2 is a hydrogen atom or alkyl, R.sup.3 is a hydrogen atom or a halogen atom, R.sup.4 is a hydrogen atom, --COR.sup.9, silyl which may be substituted or alkyl which may be substituted, one of R.sup.5 and R.sup.6 is hydroxyl, alkoxy which may be substituted, a saccharose residue, cycloalkyloxy which may be substituted or --OCOR.sup.10 and the other is a hydrogen atom or alkyl which may be substituted, or R.sup.4 and R.sup.5 together form a single bond, while R.sup.6 is a hydrogen atom or alkyl which may be substituted, each of R.sup.7, R.sup.9 and R.sup.10 is alkyl or phenyl which may be substituted, R.sup.

Abstract: Exo-3',4'-O-benzylidene-3"-dimethylchartreusin (exo-BDMC) or its salts and 3"-demethylchartreusin (3"-DMC) or its salts are provided according to the present invention. Exo-BDMC and its salts are useful for antitumorous agents and antibacterial agents. 3"-DMC and its salts are useful as starting materials for producing exo-BDMC.

Abstract: Antimicrobial powders are obtained by suppporting at least one antimicrobial metal of copper, zinc and alloys thereof on the surface of hydrous titanium oxide or titanium oxide particles by electroless plating, vapor deposition, compression mixing, mixing and reducing, and thermal decomposition of a compound. These powders are used to provide antimicrobial resin compositions, antimicrobial rubber compositions, antimicrobial glass compositions and antimicrobial coating compositions.