Objective: To study the chemical constituents of medicinal insect Vespa
auraria. Methods: The monomer
compounds were obtained by the methods of chromatographic separations and
purification, and the
structures of compounds were identified by carbon and hydrogen NMR data
analysis combined with literature comparison. Results: Eleven compounds were isolated and
identified from the chloroform extract of Vespa auraria, including five cyclic dipeptides: cyclo(Ala-Pro)(1), cyclo(Pro-Pro)(2), cyclo(Pro-Gly)(3), cyclo(Pro-Tyr)(4), cyclo(Thr-Pro)(5), one acetylated amino acid: N-acetyl-isoleucine(6), one organic
amine: N-acetyl-4-(4-hydroxybenzene)ethylamine(7), and three small molecule heterocyclic acids: nicotinic cacid(8), 1-methyl-1,2,3,4-tetrahydro-carboline-3-carboxylic
acid(9), 3-indoleacetic acid(10), and one benzodioxane compound:(2R,3S)-2-(3',4'-dihydroxyphenyl)-3-acetylamino-7-(N-acetyl-2''-aminoethyl)-1,4-benzodioxane(11). Conclusion: All the eleven compounds are
isolated from this medicinal insect for the first time.