ANTIOXIDANT NAPHTHOQUINONES OF Sinningia reitzii FROM SANTA CATARINA STATE, BRAZIL

AUTOR(ES)

Winiewski, Vanessa; Silva, Adson S.; Alvarez, Kattleen D. C.; Sá, Eduardo L. de; Salvador, Marcos J.; Stefanello, Maria Élida A.

FONTE

Quím. Nova

DATA DE PUBLICAÇÃO

2021-03

RESUMO

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.

Documentos Relacionados

• MRSA from Santa Catarina State, Southern Brazil: intriguing epidemiological differences compared to other Brazilian regions
• Copper and zinc accumulation, fractionation and migration in vineyard soils from Santa Catarina State, Brazil
• Bird diversity and conservation in the southern coast of Santa Catarina state, Brazil
• Environmental Violation Fines Growth in the Northern Region of Santa Catarina State, Brazil
• Five new records and an identification key of the lichen genus Leptogium from Santa Catarina state, Brazil