Definition: Penthioxanthone, also known as 3-oxo-4-methylpenthione (OPMT), is a type of benzothiazole chemical compound that has been found in a variety of plant species and has various pharmacological properties. It is often used as an antioxidant and anti-inflammatory agent. Penthioxanthone can be synthesized from the benzophenone 3-oxo-4-methylpenthione (OPMT) by
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