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Ascarosides that regulate development and behavior in C. elegans. ascr#1–4, ascr#5 and icas#9 were identified via activity guided fractionation,1,2,3,4,13 ascr#7 and ascr#8 were identified using differential analysis of 2D NMR spectra (DANS),5 and ascr#9 and #10 were detected using mass spectrometric techniques.8
