Amthamine is a selective histamine H2 receptor agonist which does not stimulate activity of H1 and H3 receptors. Similar to histamine, Amthamine inhibits receptor -mediated eosinophil peroxidase. Amthamine has been shown to suppress the release of serotonin and has been used to study the involvement of H1 and H2 receptors on ion secretion.

Amlodipine besilate impurity F, also known as Amlodipine Dimethyl Ester, is a biochemical.

Amlodipine besilate impurity E is a biochemical.

S-acetyl-PEG4-propargyl is a PEG Linker.

S-acetyl-PEG3-acid is a PEG Linker.

Thiol-PEG3-t-butyl ester is a PEG derivative containing a thiol group and a t-butyl ester. The hydrophilic PEG spacer increases solubility in aqueous media. The thiol group reacts with maleimide, OPSS, vinylsulfone and transition metal surfaces including gold, silver, etc. The t-butyl protected carboxyl group can be deprotected under acidic conditions.

Propargyl-PEG2-Tos is a PEG derivative containing a tosyl group and a propargyl group. The hydrophilic PEG spacer increases solubility in aqueous media. The tosyl group is a very good leaving group for nucleophilic substitution reactions. The propargyl group can be reacted with azide-bearing compounds or biomolecules via copper catalyzed azide-alkyne Click Chemistry to yield a stable triazole linkage.

Tos-PEG4-acid is a PEG derivative containing a tosyl group and a terminal carboxylic acid. The hydrophilic PEG spacer increases solubility in aqueous media. The tosyl group is a very good leaving group for nucleophilic substitution reactions. The terminal carboxylic acid can be reacted with primary amine groups in the presence of activators (e.g. EDC, or DCC) to form a stable amide bond.

Diethoxy-phosphorylethyl-PEG5-ethylphosphonic acid is a PEG Linker.

Bromo-PEG5-phosphonic acid diethyl ester is a PEG Linker.

Bromo-PEG5-phosphonic acid is a PEG Linker

Bromo-PEG2-phosphonic acid is a PEG Linker.

PEG5-bis-(ethyl phosphonate) is a PEG Linker.

m-PEG4-succinimidyl carbonate is a PEG Linker.

Bis-Mal-Lysine-PEG4-TFP ester is a PEG Linker.

Bis-Mal-Lysine-PEG4-acid is a PEG Linker.

Mal-amido-PEG2-TFP ester is a PEG Linker.

Mal-PEG4-alcohol is a PEG derivative containing a maleimide group and a hydroxyl group. The hydrophilic PEG spacer increases solubility in aqueous media. The hydroxyl group enables further derivatization or replacement with other reactive functional groups. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol.

Mal-PEG3-alcohol is a PEG derivative containing a maleimide group and a hydroxyl group. The hydrophilic PEG spacer increases solubility in aqueous media. The hydroxyl group enables further derivatization or replacement with other reactive functional groups. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol.

Mal-Amido-PEG4-t-butyl ester is a PEG derivative containing a maleimide group and a t-butyl ester group. The hydrophilic PEG spacer increases solubility in aqueous media. The t-butyl protected carboxyl group can be deprotected under acidic conditions. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol.

Mal-PEG4-PFP is a PEG Linker.

Mal-PEG2-NHS ester is a PEG derivative containing a maleimide group and an NHS ester group. The hydrophilic PEG spacer increases solubility in aqueous media. The NHS ester can be used to label the primary amines (-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol.

Azido-PEG4-Amido-tri-(t-butoxycarbonylethoxymethyl)-methane is a branched PEG derivative with a terminal azide group and three t-butyl esters. The azide group enables PEGylation via Click Chemistry. The t-butyl protected carboxyl groups can be deprotected under mild acidic conditions.

Azido-PEG4-4-nitrophenyl carbonate is a PEG derivative containing an azide group and an reactive nitrophenyl carbonate(NPC group). The NPC group is reactive towards the amino group of lysine by means of stable urethane linkages. The azide group enables Click Chemistry. The hydrophilic PEG spacer increases solubility in aqueous media.

Azide-PEG7-Tos is a PEG derivative containing an azide group and a tosyl group. The hydrophilic PEG spacer increases solubility in aqueous media. The azide group can react with alkyne, BCN, DBCO via Click Chemistry to yield a stable triazole linkage. The tosyl group is a good leaving group for nucleophilic substitution reactions.

Azido-PEG5-CH2CO2-t-Bu is a PEG derivative containing an azide group and a t-butyl ester. The hydrophilic PEG spacer increases solubility in aqueous media. The azide group can react with alkyne, BCN, DBCO via Click Chemistry to yield a stable triazole linkage. The t-butyl protected carboxyl group can be deprotected under acidic conditions.

Azide-PEG5-t-butyl ester is a PEG derivative containing an azide group and a t-butyl ester. The hydrophilic PEG spacer increases solubility in aqueous media. The azide group can react with alkyne, BCN, DBCO via Click Chemistry to yield a stable triazole linkage. The t-butyl protected carboxyl group can be deprotected under acidic conditions.

Azido-PEG5-succinimidyl carbonate is a PEG Linker.

Azido-PEG1-CH2CO2-NHS is a PEG Linker.

Azido-PEG5-NHS ester is a PEG derivative containing an azide group and an NHS ester. The hydrophilic PEG spacer increases solubility in aqueous media. The azide group can react with alkyne, BCN, DBCO via Click Chemistry to yield a stable triazole linkage. The NHS ester can be used to label the primary amines (-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules.