Further farnesyl-homogentisic acid derivatives from Otoba parvifolia
1995
Ferreira, A.G. | Fernandes, J.B. | Vieira, P.C. | Gottlieb, O.R. | Gottlieb, H.E.
The seeds of Otoba parvifolia contain three novel compounds apparently derived from homogentisic acid, rel-(1'R,5'R)-2-(1'-farnesyl-5'-hydroxy-2'-oxocyclohex-3'-en -1'-yl)-acetic acid and its acetate as well as rel-(1'R,4'S,5'R)-2-(1'-farnesyl-4',5'-dihydroxy-2'-oxocyclo -hexan-1'-yl)-acetic acid delta-lactone. The structure of an additional isolate, previously described as 2-(1'-farnesyl-2'-hydroxy-5'-oxocyclohex-3'-en-1'-yl)-acetic acid gamma-lactone was revised to rel-(1'R,5'R)-2-(1'-farnesyl-5'-hydroxy-2'-oxocyclohex-3'-en -1'-yl)-acetic acid delta-lactone.
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