Callimorphine
Reference standards.
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Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to
24 months(2-8C).
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20C. Generally, these will be useable for up to two weeks. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.
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The packaging of the product may have turned upside down during transportation, resulting in the natural compounds adhering to the neck or cap of the vial. take the vial out of its packaging and gently shake to let the compounds fall to the bottom of the vial. for liquid products, centrifuge at 200-500 RPM to gather the liquid at the bottom of the vial. try to avoid loss or contamination during handling.
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Insect Biochemistry and Molecular Biology,2007,37(1):80–89.
Absolute configuration of the creatonotines and callimorphines, two classes of arctiid-specific pyrrolizidine alkaloids[Reference:
WebLink]
METHODS AND RESULTS:
There are two classes of insect PAs, the creatonotines and the Callimorphines. The creatonotines contain as necic acids either 2-hydroxy-3-methylbutyric acid (creatonotine A) or 2-hydroxy-3-methylpentanoic acid (creatonotine B). The three known Callimorphines contain 2-hydroxy-2-methylbutanoic acid whose hydroxyl group can be either free (deacetylCallimorphine) or acetylated (Callimorphine) or propionylated (homoCallimorphine).
CONCLUSIONS:
Analysis of the creatonotines and Callimorphines isolated from the polyphagous arctiids Estigmene acrea and Grammia geneura that were fed with pure PAs and defined PA mixtures revealed the following absolute configuration: the Callimorphines and creatonotine A were present in 2′R configuration, whereas creatonotine B was found as mixture of (2′R, 3′S)- and (2′S, 3′S)-stereoisomers. The ratio of 2′S to 2′R was extremely variable ranging from 98% S to 94% R.
Tetrahedron Letters,1980,21(14):1383–1384.
Callimorphine: identification and synthesis of the cinnabar moth “metabolite”.[Reference:
WebLink]
METHODS AND RESULTS:
Callimorphine, a putative pyrrolizidine alkaloid metabolite found in some Arctiid moths which feed as larvae on plants containing pyrrolizidine alkaloids, has been identified and synthesised.
