Summary Summary. Acute intermittent porphyria (AIP) is one of the liver (hepatic) porphyrias. AIP is caused by low levels of porphobilinogen deaminase (PBGD), an enzyme also often called hydroxymethylbilane synthase.
Pyridine-N-oxide is the heterocyclic compound with the formula C 5 H 5 NO. This colourless, hygroscopic solid is the product of the oxidation of pyridine. It was originally prepared using peracids as the oxidising agent. The molecule is planar.yridine-N-oxide is the heterocyclic compound with the formula C 5 H 5 NO. This colourless, hygroscopic solid is the product of the oxidation of pyridine. It was originally prepared using peracids as the oxidising agent. The molecule is planar.
Dissolve 0.1 to 1 mg of the sample in 0.1 mL solvent, add. 0.1 mL of the respective anhydride and heat to 60â70 Â°C for. 1â2 hours. If the sample need not be concentrated prior to. the analysis and if there is no danger of catalytically induced. side reactions, pyridine is used as solvent.