A method of sealing an end of a polymer with a carbodiimide compound without liberating an isocyanate compound. A compound including a cyclic structure having one carbodiimide group whose first nitrogen and second nitrogen are bonded together by a bond group is used as an end-sealing agent for the polymer.

A method of sealing an end of a polymer with a carbodiimide compound without liberating an isocyanate compound. A compound including a cyclic structure having one carbodiimide group whose first nitrogen and second nitrogen are bonded together by a bond group is used as an end-sealing agent for the polymer.

Provided herein are compounds for use as photochromic molecular switches having very long thermal isomerization half-lives and switchable fluorescence properties both in solution and the solid state.

Provided herein are compounds for use as photochromic molecular switches having very long thermal isomerization half-lives and switchable fluorescence properties both in solution and the solid state.

The present invention provides inventive conjugated polyethyleneimine (PEI) polymers and conjugated aza-macrocycles (collectively referred to herein as “conjugated lipomers” or “lipomers”) containing one or more groups of the formula (iii):

##STR00001##

wherein R.sup.3 and R.sup.4 are as defined herein. Also provided are compositions comprising the inventive conjugated lipomers, and methods of preparation and use.

The present invention provides inventive conjugated polyethyleneimine (PEI) polymers and conjugated aza-macrocycles (collectively referred to herein as “conjugated lipomers” or “lipomers”) containing one or more groups of the formula (iii):

##STR00001##

wherein R.sup.3 and R.sup.4 are as defined herein. Also provided are compositions comprising the inventive conjugated lipomers, and methods of preparation and use.

The present invention relates to pharmaceutical compositions of 1,2,4-oxadiazole compounds or a pharmaceutically acceptable salt thereof of formula (I)

##STR00001##

In the formula Q is O, R.sub.1 is the side chain of Ser, R.sub.2 is —CO-Thr, R.sub.3 is the side chain of Asn or Glu, and R.sub.4, R.sub.5 and R.sub.6 are each H.

The present invention relates to pharmaceutical compositions of 1,2,4-oxadiazole compounds or a pharmaceutically acceptable salt thereof of formula (I)

##STR00001##

In the formula Q is O, R.sub.1 is the side chain of Ser, R.sub.2 is —CO-Thr, R.sub.3 is the side chain of Asn or Glu, and R.sub.4, R.sub.5 and R.sub.6 are each H.

The present invention provides inventive conjugated polyethyleneimine (PEI) polymers and conjugated aza-macrocycles (collectively referred to herein as conjugated lipomers or lipomers) containing one or more groups of the formula (iii): ##STR00001##
wherein R.sup.3 and R.sup.4 are as defined herein. Also provided are compositions comprising the inventive conjugated lipomers, and methods of preparation and use.

The present invention provides inventive conjugated polyethyleneimine (PEI) polymers and conjugated aza-macrocycles (collectively referred to herein as conjugated lipomers or lipomers) containing one or more groups of the formula (iii): ##STR00001##
wherein R.sup.3 and R.sup.4 are as defined herein. Also provided are compositions comprising the inventive conjugated lipomers, and methods of preparation and use.