Abstract: Provided herein are optically active stereoisomers of tricylclodecan-9-yl xanthogenate, processes of preparation, and pharmaceutical compositions thereof. Also provided are methods of their use for treating, preventing, or ameliorating one or more symptoms of a disease caused by a virus.

Abstract: Dithiocarbonate-containing macromer that contain biodegradable or water-soluble segments, and polymers derived from the reaction of these dithiocarbonate-containing macromers, are disclosed. The polymers derived from these dithiocarbonate-containing macromers with biodegradable or water-soluble segments are useful in medical and pharmaceutical applications.

Abstract: Novel benzophenonehydrazone derivatives represented by the formula (I): ##STR1## wherein, R.sup.1 is halogen; R.sup.2 is hydrogen or C.sub.1-4 alkyl; R.sup.3 is cyano, optically substituted C.sub.1-4 alkyl, C.sub.2-4 alkenyl, C.sub.3-4 alkynyl, C.sub.1-4 alkyl-carbonyl or C.sub.1-4 alkoxy-thiocarbonyl; R.sup.4 is hydrogen, phenyl, optionally substituted C.sub.1-6 alkyl, optionally substituted C.sub.2-8 alkenyl, --CO--R.sup.8, --CO--O--R.sup.9 or ##STR2## R.sup.5 is hydrogen, formyl, phenyl, optionally substituted C.sub.1-8 alkyl, optionally substituted C.sub.2-8 alkenyl, optionally substituted C.sub.3-8 alkynyl, optionally substituted C.sub.1-8 alkyl-arbonyl, optionally substituted C.sub.1-6 alkyl-oxalyl, optionally substituted C.sub.1-8 alkoxy-carbonyl, optionally substituted C.sub.1-8 alkoxy-oxalyl, optionally substituted C.sub.3-8 cycloalkyl-carbonyl, optionally substituted C.sub.2-8 alkenyl-carbonyl or optionally substituted benzoyl; R.sup.6 is hydrogen or halogen; R.sup.7 is hydrogen, halogen or C.sub.

Abstract: Alkyl xanthates of phenols are prepared by a method comprising contacting an alkali metal salt of a phenol that is substantially free of water with carbon disulfide and an alkylating agent while employing a solvent in the reaction mixture.

Abstract: Novel antitumor and antiviral xanthate compounds, a process for their production, pharmaceutical compositions containing said xanthate compounds, and a method of combating viruses and tumors therewith, are disclosed.

Abstract: Process for the preparation of ore flotation collectors is disclosed comprising reacting an alkali metal salt of a 2-mercaptobenzimidazole with carbon disulfide. Also disclosed is process for recovery of minerals by flotation employing the novel ore flotation collectors prepared as described above.