Piper attenuatum
Chinese: Luan ye hu jiao.
English: Oval-leaved pepper plant; Flat-branched pepper
Tamil: Arenuka; Attu-milaku.
Malay: Sirih dingin (Indonesia); Kattumulaka.
Region: northeastern tropical Himalayas, Assam, Khasi Hills, Nilgiris hills, India, Bhutan.
Botany: climbing shrub; stems thin, papery; leaves oval; habita forests between 200 and 460 m.
Content: neolignans; cepharanone B; piperolactam A; piperolactam D; cepharadione A.
Source
Sumathykutty M.A. & Madhusudana Rao J.; 8-Hentriacontanol and other constituents from Piper attenuatum; Phytochemistry, Volume 30, Issue 6, Pages 2075-2076; 1991.