What is "wrightia antidysenterica"

Wrightine \Wright"ine\, n. (Chem.) A rare alkaloid found in the bark of an East Indian apocynaceous tree ( Wrightia antidysenterica), and extracted as a bitter white crystalline substance. It was formerly used as a remedy for diarrh[oe]a. Called also conessine, and neriine.

Wrightia antidysenterica, the coral swirl or tellicherry bark, is a flowering plant in the genus Wrightia. Wrightia antidysenterica is sometimes confused with the species Holarrhena pubescens due to a second, taxonomically invalid publication of the name Holarrhena pubescens. It's been long known in Indian Ayurvedic tradition and is called " kuṭaja " in Sanskrit and වල් ඉද්ද (wal idda) in Sinhala. It is also known as "White Angel" in the Philippines.