| Full text | |
| Author(s): |
Winiewski, Vanessa
[1]
;
Silva, Adson S.
[1]
;
Alvarez, Kattleen D. C.
[2]
;
de Sa, Eduardo L.
[1]
;
Salvador, Marcos J.
[2]
;
Stefanello, Maria Elida A.
[1]
Total Authors: 6
|
| Affiliation: | [1] Univ Fed Parana, Dept Quim, BR-81530900 Curitiba, Parana - Brazil
[2] Univ Estadual Campinas, Inst Biol, Dept Biol Vegetal, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | Química Nova; v. 44, n. 3, p. 284-287, 2021. |
| Web of Science Citations: | 1 |
| Abstract | |
Sinningia reitzii (Hoehne) L. E. Skog (Gesneriaceae) is a subshrub native to Brazil, where it is distributed in two disjunctive populations around the 26°S and 23°S parallels. In this work, tubers of plants from the wild population growing at the 26°S parallel (Santa Catarina state) yielded two new naphthoquinones, 5,6-dihydroxy-7-methoxy-a-dunnione and 8-hydroxy-6,7-dimethoxy-a-dunnione. Three known compounds were also isolated: 6,8-dihydroxy-7-methoxy-a-dunnione, 5-hydroxy-6,7-dimethoxy-a-dunnione, and 6,8-dihydroxy-7-methoxy-2-O-methyldunniol. The naphthoquinones 6,8-dihydroxy-7-methoxy-2-O-methyldunniol, 6,8-dihydroxy-7-methoxy-a-dunnione, and 5,6-dihydroxy-7-methoxy-a-dunnione displayed antioxidant activity in the ORAC-FL method, with values of relative trolox equivalent in the range of 1.39-4.83 mmol g-1. (AU) | |
| FAPESP's process: | 15/03726-8 - Integrated chemical and biological study in the search for bioactive substances in plants* and development of analytical procedures. *(Amaranthaceae, Gesneriaceae, Myrtaceae e Annonaceae) |
| Grantee: | Marcos José Salvador |
| Support Opportunities: | Regular Research Grants |