New cycloartane triterpenes from bioactive extract of propolis from Pitcairn Island;

;Kristina Georgieva, Boryana Trusheva, Veselina Uzunova, Tihomira Stoyanova, Violeta Valcheva, Milena Popova, Rumiana Tzoneva, Vassya Bankova, Fitoterapia 128 (2018) 233–241, 2018.