It is a big climber that grows by climbing on large trees and found throughout tropical India, ascending to an altitude of 1000 ft. The one, which climbs the neem tree, is considered of the best quality. The stems are fleshy. Roots are long thread like, aerial, arising from branches. Bark is thin, grayish or creamy white in colour, when peeled fleshy stem is exposed. Leaves are cordate that is heart shaped, membranous and juicy. Flowers are blooming during summer. Male flowers are small, yellow or green coloured occur in clusters. Female flowers occur singly. Fruits are pea shaped; fleshy, shiny turn red when boiled. Occur in winter. Seeds are curved. It is also known as Heart-leaved Moonseed.
(d) By inclusion of the 2-amino nitrogen atom in a cyclic structure. Examples of substituted cathinones include, but are not limited to, methylone (3,4-methylenedioxymethcathinone), MDPV (3,4-methylenedioxypyrovalerone), mephedrone (4-methylmethcathinone), 4-methoxymethcathinone, 4-fluoromethcathinone, 3-fluoromethcathinone, Pentedrone (2-(methylamino)-1-phenyl-1-pentanone), pentylone (1-(1,3-benzodioxol-5-yl)-2-(methylamino)-1-pentanone), 2-(1-pyrrolidinyl)-1-(4-methylphenyl)-1-propanone, alpha-PVP (1-phenyl-2-(1-pyrrodinyl)-1-pentanone), cathinone (2-amino-1-phenyl-1-propanone), and methcathinone (2-(methylamino)-propiophenone).