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Anthony J Herlt
Research School of Chemistry, Australian National University, Canberra ACT 0200
Chemical Engineering, Chemistry & Bioengineering Chemistry

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ISOLATION OF AN ANTIFEEDANT TRITERPENOID FROM THE SEED OF Barringtonia asiatica Emma J Pongoh; Rymond J Rumampuk; Ponis Tarigan; Anthony J Herlt; Lewis N Mander
Indonesian Journal of Chemistry Vol 4, No 1 (2004)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (95.76 KB) | DOI: 10.22146/ijc.21873

Abstract

An antifeedant triterpenoid saponin has been isolated from the seed of Barringtonia asiatica and its structure elucidated mainly by two dimensional NMR spectroscopy is identified as 3-O-{[β-D-galactopyranosyl(1→3)-β-D-glucopyranosyl (1→2)]-β-D-glucuronopyranosyloxy}-22-O-[2-(E)-methyl-2-butenyloyloxy]-15, 16,28-trihydroxy-(3β,15α,16α,22α)-olean-12-ene. This compound showed antifeedant activity towards Epilachna sp larvae
A TRITERPENE ESTER SAPONIN FROM THE SEED OF Barringtonia asiatica Rymond J Rumampuk; Emma J Pongoh; Ponis Tarigan; Anthony J Herlt; Lewis N Mander
Indonesian Journal of Chemistry Vol 3, No 3 (2003)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (76.507 KB) | DOI: 10.22146/ijc.21880

Abstract

A triterpene ester saponin has been isolated from the seed of Barringtonia asiatica and its structure has been established by extensive application of high-resolution FABMS and two dimensional NMR techniques to be 3-O-{[β-D-galactopyranosyl(1→3)-β-D-glucopyranosyl(1→2)]-β-D-glucuronopyranosyloxy}-22-O-[2-methylbutyroyloxy]-15,16,28-trihydroxy-(3β,15α,16α,22α)-olean-12-ene.
ISOLATION AND STRUCTURE DETERMINATION OF BISDEMTHYLAAPTAMINE FROM BUNAKEN MARINE PARK SPONGE Aaptos, sp. Wilson AR Rombang; Rymond J Rumampuk; Ponis Tarigan; Anthony J Herlt; Lewis N Mander
Indonesian Journal of Chemistry Vol 3, No 3 (2003)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (50.507 KB) | DOI: 10.22146/ijc.21881

Abstract

Bisdemethylaaptamine, an alkaloid naphtyridine with molecular weight 200 and formulae molecule C11H8N2O2 has been isolated from Bunaken Marine Park sponge Aaptos sp. Isolation was done by using several stages of column chromatography and high performance liquid chromatography. Molecular weight of this naphtyridine alkaloid was determined by electron ionization (EI) and electrospray ionization (ESI) mass spectroscopies and its structure assigned to be 8,9-dihydroxy-1H-benzo[d,e][1,6]naphtyridine by proton and carbon nuclear magnetic resonances (1H and 13C-NMR).
Co-Authors Emma Julin Pongoh Lewis N Mander Ponis Tarigan Ponis Tarigan Rymond Jusuf Rumampuk Wilson AR Rombang