1. Two new triterpenoids from the seeds of blackberry (Rubus fructicosus).
- Author
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Ono M, Yasuda S, Nishi K, Yamamoto K, Fuchizaki S, Higuchi S, Komatsu H, Okawa M, Kinjo J, Yoshimitsu H, and Nohara T
- Subjects
- Antineoplastic Agents, Phytogenic isolation & purification, HL-60 Cells, Humans, Molecular Structure, Plant Extracts chemistry, Triterpenes isolation & purification, Antineoplastic Agents, Phytogenic chemistry, Rubus chemistry, Seeds chemistry, Triterpenes chemistry
- Abstract
Two new ursane-type triterpenoids (1, 2) attached to isopropylidenedioxy group were isolated from the seeds of blackberry (Rubus fructicosus L., Rosaceae) along with two known ursane-type triterpenoids, 2,3-O-isopropylidenyl-2α,3α,19α-trihydroxyurs-12-en-28-oic acid (3) and 1β-hydroxyeuscaphic acid (4). The chemical structures of 1 and 2 were determined to be 2,3-O-isopropylidene-1β,2β,3β,19α-tetrahydroxyurs-12-en-28-oic acid and 1,2-O-isopropylidene-1β,2α,3α,19α-tetrahydroxyurs-12-en-28-oic acid, respectively, based on spectroscopic data. Additionally, their cytotoxic activity towards HL-60 human leukaemia cells was evaluated. Among them, 3 demonstrated a clear cytotoxic activity with 72.8 μM of IC50 value.
- Published
- 2016
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