Plant Material. The entire plant was collected from the
Talakona forests of Tirumala Hills, Chittoor District, India,
in September 1999 and authenticated as Justicia purpurea by
Research and Specimen Cell, National Institute of Science
Communication, CSIR, New Delhi. Voucher specimens are on
deposit at NISCOM (NISCOM Field No. 1831) and the
Department of Chemistry, Sri Venkateswara University, Tirupati,
India.