N. T. Hoang Anh, N. V. Tuan, T. D. Quan, D. D. Thien, N. T. Tam, G. T. Kim Lien, T. T. Thuy and T. V. Sung, Chemical constituents of Chirita drakei Burtt collected in Ha Long bay, Quang Ninh province, Viet Nam. Part 1. Compounds isolated from the n-hexane and ethyl acetate extracts., VJChem 55 (2017) 202. DOI: https://doi.org/10.15625/2525-2321.2017-00444.