Sigmoidins J and K, two new prenylated isoflavonoids from Erythrina sigmoidea.
In addition to the two known compounds neotautenol [2] and erythrinassinate B [4], two new compounds, an isoflavanone named sigmoidin J [1] and a coumestan derivative named sigmoidin K [3], have been isolated and characterized from the root bark of the Cameroonian medicinal plant Erythrina sigmoidea. Their structures have been established as 7, 4'-dihydroxy-2',5'-dimethoxy-6'(gamma, gamma-dimethylally)isoflavanone [1] and 3,9-dihydroxy-2,10-(gamma, gamma dimethylallyl) coumestan [3], respectively, by spectroscopic techniques and from chemical evidence.
Nkengfack
A E
AE
Department of Organic Chemistry, University of Yaoundé, Cameroon.
Vouffo
T W
TW
Vardamides
J C
JC
Fomum
Z T
ZT
Bergendorff
O
O
Sterner
O
O
D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D001232:Aspergillus fumigatus / Q000187:drug effects; D002163:Cameroon; D004895:Erythrina / Q000737:chemistry*; D007529:Isoflavones / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D009682:Magnetic Resonance Spectroscopy; D008826:Microbial Sensitivity Tests; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013211:Staphylococcus aureus / Q000187:drug effects
D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D007529:Isoflavones; C090619:sigmoidin J; C090620:sigmoidin K