Alkaloids in the Mite Scheloribates laevigatus: Further Alkaloids Common to Oribatid Mites and Poison Frogs
- R. Saporito, R. A. Norton, N. R. Andriamaharavo, H. M. Garraffo, T. Spande
- Chemistry, BiologyJournal of Chemical Ecology
- 12 February 2011
The findings of this study indicate that oribatid mites, and in particular, members of the genus Scheloribates, represent a relatively unexplored arthropod repository for alkaloids and a significant dietary source of alkaloid-containing arthropods in poison frogs.
Madagascan poison frogs (Mantella) and their skin alkaloids / John W. Daly, Nirina Rabe Andriamaharavo, Marta Andriantsiferana, and Charles W. Myers. American Museum novitates ; no. 3177
The chemical defense of the Texas cave harvestman Chinquipellobunus madlae: first report on the family Stygnopsidae and on a North American troglobiont harvestman (Opilones: Gonyleptoidea)
The stygnopsid harvestman Chinquipellobunus madlae is known from numerous caves in eleven counties in Texas and is a highly adapted troglobiont, and the major volatile component of their chemical defense secretion was identified as 2-methyl-5-ethylphenol.
Alkaloids in Madagascan frogs (Mantella): pumiliotoxins, indolizidines, quinolizidines, and pyrrolizidines.
- H. M. Garraffo, J. Cáceres, J. Daly, T. Spande, N. R. Andriamaharavo, M. Andriantsiferana
- Chemistry, BiologyJournal of Natural Products
- 1 July 1993
Analysis of skin alkaloids of seven different species of Mantella shows a new alkaloid class, which appears to contain a quinolizidine moiety, is seen in M. aurantiaca and M. crocea and is represented by 235C and several congeners.
Alkaloids from single skins of the Argentinian toad Melanophryniscus rubriventris (ANURA, BUFONIDAE): An unexpected variability in alkaloid profiles and a profusion of new structures
- H. M. Garraffo, N. R. Andriamaharavo, M. Vaira, M. F. Quiroga, Cecilia I. Heit, T. Spande
- Chemistry, BiologySpringerPlus
- 23 November 2012
GC-MS analysis of single-skins of ten Melanophryniscus rubriventris toads captured during their breeding season in NW Argentina has revealed a total of 127 alkaloids of which 56 had not been previously detected in any frog or toad, Included among these new alkaloid are 23 new diastereomers of previously reported alkaloidal structures.
Use of Large Retention Index Database for Filtering of GC–MS False Positive Identifications of Compounds
The use of the large retention index database for identification and filtering of false positive hits in GC–MS analysis of the ylang-ylang essential oil is illustrated. Differences between…
Efficient enantio- and diastereodivergent synthesis of poison-frog alkaloids 251O and trans-223B.
An efficient and flexible synthesis of poison-frog alkaloids 251O and trans-223B has been achieved by using for both alkaloids an enantiodivergent process starting from the common lactam 1. The…
Characterizing Vaccinium berry Standard Reference Materials by GC‐MS using NIST spectral libraries
- M. Lowenthal, N. R. Andriamaharavo, S. Stein, K. Phinney
- ChemistryAnalytical and Bioanalytical Chemistry
- 6 January 2013
A nontargeted metabolite profile of Vaccinium materials is described, results among related materials and from orthogonal experimental platforms are compared, and the feasibility and development of using mass spectral library matching for nontargeting metabolite identification are discussed.
A Structure for 261C, a Novel Tricylic Alkaloid from the Madagascan Poison Frog, Mantella betsileo
Based upon 1 H-NMR, MS and IR spectra, a perhydro 2-allyl-5-ethyl-7-n-propylpyrrolo[2,1,5-cd]indolizine structure (1) is proposed for a major tricyclic alkaloid 261C isolated from skin extracts of a…
A revised structure for alkaloid 235C isolated from skin extracts of mantellid (Mantella) frogs of Madagascar.
- N. R. Andriamaharavo, M. Andriantsiferana, J. Daly
- ChemistryJournal of Natural Products
- 8 December 2005
A comparison is presented between the mass, infrared, and (1)H NMR spectra of 235C (2) and a synthetic dehydrohomopumiliotoxin (1), initially proposed incorrectly as the structure for 235C.