This invention provides for a compound of formula (I): ##STR00001##
or a pharmaceutically acceptable salt thereof, wherein R.sup.1-R.sup.4, L.sub.1, n and p are defined herein. The compounds of formula (X) and pharmaceutically acceptable salts thereof are cationic lipids useful in the delivery of biologically active agents to cells and tissues.

This invention provides for a compound of formula (I): ##STR00001##
or a pharmaceutically acceptable salt thereof, wherein R.sup.1-R.sup.4, L.sub.1, n and p are defined herein. The compounds of formula (X) and pharmaceutically acceptable salts thereof are cationic lipids useful in the delivery of biologically active agents to cells and tissues.

An object of the present invention is to find a novel pharmaceutical that has an excellent tryptophanase inhibitory effect and suppresses worsening of renal function to preserve the kidney by reducing production of indoxyl sulfate in the blood. The present invention provides a pharmaceutical composition containing, as an active ingredient, a compound represented by the following formula, or a pharmacologically acceptable salt thereof:

##STR00001## wherein R.sup.1 and R.sup.2 are the same or different, and represent a C.sub.1-C.sub.6 alkyl group or the like, and Ar represents an optionally substituted phenyl group or an optionally substituted thienyl group.

An object of the present invention is to find a novel pharmaceutical that has an excellent tryptophanase inhibitory effect and suppresses worsening of renal function to preserve the kidney by reducing production of indoxyl sulfate in the blood. The present invention provides a pharmaceutical composition containing, as an active ingredient, a compound represented by the following formula, or a pharmacologically acceptable salt thereof:

##STR00001## wherein R.sup.1 and R.sup.2 are the same or different, and represent a C.sub.1-C.sub.6 alkyl group or the like, and Ar represents an optionally substituted phenyl group or an optionally substituted thienyl group.

The present invention relates to a method of carrying out an organic reaction in aqueous solution in the presence of a hydroxyalkyl(alkyl)cellulose or an alkylcellulose.

The present invention relates to a method of carrying out an organic reaction in aqueous solution in the presence of a hydroxyalkyl(alkyl)cellulose or an alkylcellulose.

The present invention relates to a method of carrying out an organic reaction in aqueous solution in the presence of a hydroxyalkyl(alkyl)cellulose or an alkylcellulose.

The present invention relates to a method of carrying out an organic reaction in aqueous solution in the presence of a hydroxyalkyl(alkyl)cellulose or an alkylcellulose.

The present invention provides compounds of formula (I), and pharmaceutical compositions thereof.

##STR00001##

The present invention provides compounds of formula (I), and pharmaceutical compositions thereof.

##STR00001##