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Phenazepam is a benzodiazepine drug, which was developed in the Soviet Union and now produced in Russia and some CIS countries. It is used in the treatment of neurological disorders such as epilepsy, alcohol withdrawal syndrome and insomnia. It can be used as a premedication before surgery as it augments the effects of anesthetics and reduces anxiety.

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Phenformin is an anti-diabetic drug from the biguanide class. It was withdrawn from most markets in the late 1970s due to a high risk of lactic acidosis, which was fatal in 50% of cases. It was discovered in 1957 by Ungar, Freedman and Seymour Shapiro, working for the US Vitamin Corporation. Clinical trials began in 1958 which showed it to be effective but with gastrointestinal side effects.

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PhenoBlack is a general disinfectants of bactericidal, virucidal and fungicidal activity for use in poultry and livestock farms, zoos, hatcheries, slaughterhouses and boot dips.

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Pholcodine is a drug which is an opioid cough suppressant.It helps suppress unproductive coughs and also acts as an antifungal agent.It acts primarily on the central nervous system (CNS), causing depression of the cough reflex, partly by a direct effect on the cough centre in the medulla. It is metabolized in the liver and its action may be prolonged in individuals with hepatic insufficiency.

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Pholedrine is a drug that stimulates the sympathetic nervous system. It is administered as a topical eye drop form for the purpose of dilating the pupil. It can be used to diagnose Horner's syndrome.


Piclozotan is a selective 5-HT1A receptor partial agonist, which has neuroprotective effects in animal studies. It has been through early clinical trials in humans for treatment of acute stroke, but results have not yet been announced.


Piperazine is an organic compound that consists of a six-membered ring containing two opposing nitrogen atoms. It was first introduced as an anthelmintic in 1953. It is used in the manufacture of plastics, resins, pesticides, brake fluid and other industrial materials. It is also a fluid used for CO2 and H2S scrubbing in association with methyl diethanolamine.

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Piperidine is an organic compound. This heterocyclic amine consists of a six-membered ring containing five methylene units and one nitrogen atom. It is a widely used building block and chemical reagent in the synthesis of organic compounds, including pharmaceuticals. It is used as a solvent and as a base. A significant industrial application of piperidine is for the production of dipiperidinyl dithiuram tetrasulfide, which is used as a rubber vulcanization accelerator.

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Pitofenone is an antispasmodic.


Plinabulin is a potent microtubule-targeting agent derived from the natural diketopiperazine phenylahistin with a colchicine-like tubulin depolymerization activity.It is an anticancer agent.It will selectively attacking tumor blood vessels and starving the tumors. Plinabulin is one of several hundred analogs that were produced after finding this activity in an extract from a marine organism and made synthetically.

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