Spectroscopic characterization and identification of ecdysteroids using high-performance liquid chromatography combined with on-line UV-diode array, FT-infrared and 1H-nuclear magnetic resonance spectroscopy and time of flight mass spectrometry. - Louden,D.; Handley,A.; Taylor,S.; Lenz,E.; Miller,S.; Wilson,I.D. (J Chromatogr A, 2001)