Pterocarpus marsupium

Pterocarpus marsupium, also known as Malabar kino^[3] or Indian kino, is a medium-to-large, deciduous tree that can grow up to 31 m (102 ft) tall. It is native to India (where it occurs in parts of the Western Ghats in the Karnataka-Kerala region and in the forests of Central India), Nepal, and Sri Lanka.

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  Pterocarpus marsupium bark
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  Pterocarpus marsupium tree
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  Pterocarpus marsupium seeds (Kunming Botanical Garden)

Pterocarpus marsupium
Conservation status
Near Threatened  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Fabales
Family:	Fabaceae
Subfamily:	Faboideae
Genus:	Pterocarpus
Species:	P. marsupium
Binomial name
Pterocarpus marsupium Roxburgh
Synonyms
Pterocarpus marsupium f. acuminata (Prain) Prain Pterocarpus marsupium f. acuta Prain Pterocarpus marsupium f. biloba (Roxb. ex G. Don) Prain [2]

Phytochemistry

Pterocarpus marsupium contains 2,3,6-trimethyl-1,4-naphthoquinone (also called 2,3,6-trimethylnaphthalene-1,4-dione or TM-NQ), which, in vitro, is a reversible monoamine oxidase inhibitor occurring in tobacco leaf, and may cause skin, eye and respiratory irritation.^[4]