Summary
From adults ofPycnogonum litorale (Ström) eight ecdysteroids were isolated by HPLC and identified by mass spectrometry and NMR. One of the compounds is 20-hydroxyecdysone, two further ecdysteroids show no OH-group at C-22 (22-deoxy-20,26-dihydroxyecdysone, 22-deoxy-20-hydroxyecdysone=taxisterone). The five other compounds are esters of ecdysteroids with acetic acid (25R and 25S isomers of 20,26-dihydroxyecdysone 22-acetate, 20-hydroxyecdysone 22-acetate) or with glycolic acid (20-hydroxyecdysone 22-glycolate, ecydsone 22-glycolate). The latter are new among zoo- and phytoecdysteroids. No significant amounts of ecdysone could be detected. The origin of the ecdysteroids inPycnogonum litorale and their biological activity are discussed.
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Abbreviations
- RP-HPLC :
-
Reversed-phase high performance liquid chromatography
- NP :
-
normal phase
- RIA :
-
radioimmunoassay
- NMR :
-
nuclear magnetic resonance
- FT :
-
Fourier transform
- CI/D :
-
chemical ionization/desorption
- TFA :
-
trifluoroacetic acid
- E :
-
ecdysone
- 20E :
-
20-hydroxyecdysone
- 2026E 20 :
-
26-dihydroxyecdysone
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Bückmann, D., Starnecker, G., Tomaschko, K.H. et al. Isolation and identification of major ecdysteroids from the pycnogonidPycnogonum litorale (Ström) (Arthropoda, Pantopoda). J Comp Physiol B 156, 759–765 (1986). https://doi.org/10.1007/BF00694248
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DOI: https://doi.org/10.1007/BF00694248