| Structure Identification: |
| Chem Biodivers . 2015 Jan;12(1):148-152. | | Two new hydronaphthoquinones from Sinningia aggregata (Gesneriaceae) and cytotoxic activity of aggregatin D[Pubmed: 25641842] | | Two new hydronaphthoquinones, aggregatins E and F (1 and 2, resp.) were isolated from the tubers of Sinningia aggregata (Ker-Gawl.) Wiehler (Gesneriaceae), along with twelve known compounds aggregatin D (3), tectoquinone (4), 1-hydroxy-2-methylanthraquinone (5), icosyl ferulate (6), pustuline (7), 1,6-dihydroxy-2-methylanthranquinone (8), 6-hydroxy-2-methylanthraquinone (9), 7-hydroxy-2-methylanthraquinone (10), tyrosol (11), Halleridone (12), calceolarioside B (13), and cornoside (14). All compounds were identified by analysis of spectroscopic and spectrometric data. Compounds 3, 4, and 10 had already been reported in this species. Compounds 2 and 3 were evaluated against several tumor cell lines, but only 3 exhibited activities against UACC-62, 786-0 and OVCAR-3 cell lines, with IC50 values of 12.3, 12.8 and 0.3 μg/ml, respectively, without toxic effects on non-cancer cell line HaCat (human keratinocyte). | | J Nat Prod . 2016 Apr 22;79(4):792-798. | | Naphthochromenes and Related Constituents from the Tubers of Sinningia allagophylla[Pubmed: 27043314] | | Chemical investigation of the tubers of Sinningia allagophylla led to the isolation of two new chromenes, (2S)-12-hydroxylapachenole (1) and (3R)-3,4-dihydro-3-hydroxy-4-oxo-8-methoxylapachenole (2), and three new dimeric chromenes, allagophylldimers A-C (3-5). Thirteen known compounds, 6-methoxy-7,8-benzocoumarin (6), lapachenole, 8-methoxylapachenole, tectoquinone, 7-hydroxytectoquinone, dunniol, α-dunnione, dunnione, 8-hydroxydunnione, aggregatin E, cedrol, oleanolic acid, and Halleridone, were also identified. 6-Methoxy-7,8-benzocoumarin (6) has been isolated for the first time from a natural source. |
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