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GC-MS analysis of sterols from the purified DRMs. (A) Gas chromatogram of silylated sterols. (B) Identification of the sterol derivatives separated in the chromatogram shown in A by electron impact mass spectrometry. The table presents the retention times (RT) and peak numbers highlighted in A, as well as the m/z ratios of the characteristic ion fragments obtained by fragmentation of each sterol derivative.
