Bioactive chromenes from Rhyncholacis penicillata.
Investigation of the aerial parts of Rhyncholacis penicillata afforded the new chromenes, 7-hydroxy-6-(3-methylbutyryl)-5-oxymethyl-chromene (rhynchonin A) and 7-hydroxy-6-(2-methylbutyryl)-6-oxymethylchromene (rhynchonin B). Structures were elucidated by spectroscopic methods and independent synthesis. Rhynchonin A showed broad insecticidal, acaricidal and nematicidal potency including strong biological activity against Heliothis zea.
Burkhardt
G
G
Universität des Saarlandes, Saarbrücken, Germany.
Becker
H
H
Grubert
M
M
Thomas
J
J
Eicher
T
T
D000818:Animals; D000969:Antinematodal Agents / Q000737:chemistry / Q000494:pharmacology*; D002839:Chromans / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D007306:Insecticides / Q000737:chemistry / Q000494:pharmacology*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D010944:Plants / Q000737:chemistry*; D013987:Ticks
D000969:Antinematodal Agents; D002839:Chromans; D007306:Insecticides; C092918:rhynchonin A; C092919:rhynchonin B