The composition contains: a compound which has a group represented by formula (1); and a solvent. In the formula (1), R.sup.1 and R.sup.2 each independently represent a substituted or unsubstituted aryl group having 6 to 30 ring atoms or a substituted or unsubstituted heteroaryl group having 5 to 30 ring atoms; R.sup.3 represents a hydrogen atom or a substituted or unsubstituted monovalent aliphatic hydrocarbon group having 1 to 10 carbon atoms; and * denotes a bonding site to a part other than the group represented by the following formula (1) in the compound. ##STR00001##

The composition contains: a compound which has a group represented by formula (1); and a solvent. In the formula (1), R.sup.1 and R.sup.2 each independently represent a substituted or unsubstituted aryl group having 6 to 30 ring atoms or a substituted or unsubstituted heteroaryl group having 5 to 30 ring atoms; R.sup.3 represents a hydrogen atom or a substituted or unsubstituted monovalent aliphatic hydrocarbon group having 1 to 10 carbon atoms; and * denotes a bonding site to a part other than the group represented by the following formula (1) in the compound. ##STR00001##

A moisture control material including a salt composed of a pyrazolium cation represented by the formula (N1) and a phosphate ester anion. In formula (N1), R.sup.N1, R.sup.N2, R.sup.N3, R.sup.N4 and R.sup.N5 are each independently a hydrogen atom, or an alkyl group having 1 to 12 carbon atoms which optionally has a hydroxy group and optionally includes one or more oxygen atoms in the chain. One or more of R.sup.N1 and R.sup.N2 which are substituents on a nitrogen atom that constitutes a 5-membered ring are alkyl groups having 1 to 12 carbon atoms, which optionally have a hydroxy group and optionally include one or more oxygen atoms in the chain.

##STR00001##

A method of forming a N-substituted pyrrole of formula (1) that includes reacting an amine of formula (2) with a compound of formula (3) in the presence of a catalyst including juice from a fruit of a plant in the genus Malus, ##STR00001## R.sub.1 and R.sub.2 are each independently a hydrogen, an optionally substituted alkyl, an optionally substituted cycloalkyl, an optionally substituted arylalkyl, or an optionally substituted aryl; or wherein R.sub.1 and R.sub.2 together form a five-, six-, or seven-membered ring with the carbon atoms to which they are attached; and R.sub.3 is a hydrogen, an optionally substituted alkyl, an optionally substituted cycloalkyl, an optionally substituted arylalkyl, or an optionally substituted aryl.

A method of forming a N-substituted pyrrole of formula (1) that includes reacting an amine of formula (2) with a compound of formula (3) in the presence of a catalyst including juice from a fruit of a plant in the genus Malus, ##STR00001## R.sub.1 and R.sub.2 are each independently a hydrogen, an optionally substituted alkyl, an optionally substituted cycloalkyl, an optionally substituted arylalkyl, or an optionally substituted aryl; or wherein R.sub.1 and R.sub.2 together form a five-, six-, or seven-membered ring with the carbon atoms to which they are attached; and R.sub.3 is a hydrogen, an optionally substituted alkyl, an optionally substituted cycloalkyl, an optionally substituted arylalkyl, or an optionally substituted aryl.

A green synthetic method for making a pyrrole. The method includes reacting an aryl amine with a compound having a furan moiety in the presence of an organic catalyst that contains juice.

A green synthetic method for making a pyrrole. The method includes reacting an aryl amine with a compound having a furan moiety in the presence of an organic catalyst that contains juice.

A method utilizes a natural juice as a reaction medium and catalyst for the reaction between an amine and an organic compound to form a pyrrole. The method includes reacting an amine with an organic compound in a condensation reaction in which the juice functions as an organic catalyst.

A method utilizes a natural juice as a reaction medium and catalyst for the reaction between an amine and an organic compound to form a pyrrole. The method includes reacting an amine with an organic compound in a condensation reaction in which the juice functions as an organic catalyst.

A method of forming a N-substituted pyrrole of formula (1) that includes reacting an amine of formula (2) with a compound of formula (3) in the presence of a catalyst including juice from a fruit of a plant in the genus Malus, ##STR00001## R.sub.1 and R.sub.2 are each independently a hydrogen, an optionally substituted alkyl, an optionally substituted cycloalkyl, an optionally substituted arylalkyl, or an optionally substituted aryl; or wherein R.sub.1 and R.sub.2 together form a five-, six-, or seven-membered ring with the carbon atoms to which they are attached; and R.sub.3 is a hydrogen, an optionally substituted alkyl, an optionally substituted cycloalkyl, an optionally substituted arylalkyl, or an optionally substituted aryl.