Abstract: A compound of the general formula [I]: ##STR1## wherein R.sub.1 represents a higher alkyl group or an N-(higher alkyl)carbamoyl group, R.sub.2 represents a lower alkyl group, an acyl group having at least three carbon atoms, an N-(lower alkyl)carbamoyl group, an N-(lower alkyl)thiocarbamoyl group or a benzyl group, R represents a primary, secondary or tertiary amino group or a quaternary ammonium group, x is 1 or 2, y is a number of 0, 1 or 2, and z is an integer of 2-10, or a pharmaceutically acceptable salt thereof. The novel substances have both anti-tumor activity and platelet activating factor-inhibiting property, and they are effective as an anti-tumor agent without circulatory trouble.

Abstract: A process is disclosed for production of a sugar ketal, which comprises reacting a sugar with a ketone in the presence of hydrogen iodide. The formation of unfavorable by-products can be reduced to a trace amount. The process offers the objective ketal in improved yields, and an industrially advantageous process.

Abstract: A process is disclosed for production of a sugar ketal, which comprises reacting a sugar with a ketone in the presence of (A) (1) copper, or an oxide, hydroxide or salt thereof and (2) hydrogen chloride or hydrogen bromide, or (B) cupric chloride or cupric bromide, said catalyst system being very effective in a small amount. The formation of unfavorable by-products can be reduced to a trace amount. The process offers the objective ketal in improved yields, and an industrially advantageous process.

Abstract: Indancarboxylic acid zinc salts of the formula: ##STR1## wherein X is a halogen atom, are novel compounds and have excellent pharmaceutical activities such as analgesic, antipyretic and antiinflammatory activities.

Abstract: Compounds of formula: ##STR1## wherein R is hydroxyl, lower alkoxy having 1 to 4 carbon atoms or amino and R.sup.1 is hydrogen or lower alkyl having 1 to 4 carbon atoms, are useful as medicines such as antipyretics, analgesics and antiinflammatory agents.

Abstract: Compounds of the formula: ##STR1## WHEREIN R.sup.1 is an aryl group which may be substituted, R.sup.2 is hydrogen or a lower alkyl group having 1 to 4 carbon atoms and n is 1 or 2, or derivatives at the carboxyl function thereof, are useful as medicines such as antipyretics, analgesics and anti-inflammatory agents.

Abstract: Compounds of the formula: ##STR1## wherein R.sup.1 is an aryl group which may be substituted, R.sup.2 is hydrogen or a lower alkyl group having 1 to 4 carbon atoms and n is 1 or 2, or derivatives at the carboxyl function thereof, are useful as medicines such as antipyretics, analgesics and anti-inflammatory agents.

Abstract: Compounds of the formula: ##SPC1##Wherein R.sup.1 is an aryl group which may be substituted, R.sup.2 is hydrogen or a lower alkyl group having 1 to 4 carbon atoms and n is 1 or 2, or derivatives at the carboxyl function thereof, are useful as medicines such as antipyretics, analgesics and anti-inflammatory agents.