<b>Appendix 3</b>

ON THE EQUATION x2+2a ·3b =yn

trimethylchlorosilane; cholesterol, Cholest-5-en-3b-ol; oxysterols, cholesterol oxidation products; 7-ketocholesterol, cholest-5-en-3b-ol-7-one; cholestanetriol, cholestan-3b,5a,6b-triol; a-epoxycholesterol, cholestan-5a,6a-epoxy-3b-ol; 25-hydroxycholesterol, cholest-5-en-3b,25-diol; 7a-hydroxycholesterol, Cholest-5-en-3b,7a-diol; 7b- hydroxycholesterol, cholest-5-en-3b,7b-diol; b-epoxycholesterol, cholestan-5b,6b-epoxy-3b-ol; 27-hydroxycholesterol, 25R-cholest-5-en-

Abbreviations : HMDS, 1,1,1,3,3,3-hexamethyldisilazane; TMCS, trimethylchlorosilane; cholesterol, Cholest-5-en-3b-ol; oxysterols, cholesterol oxidation products; 7-ketocholesterol, cholest-5-en-3b-ol-7-one; cholestanetriol, cholestan-3b,5a,6b-triol; a-epoxycholesterol, cholestan-5a,6a-epoxy-3b-ol; 25-hydroxycholesterol, cholest-5-en-3b,25-diol; 7a-hydroxycholesterol, Cholest-5-en-3b,7a-diol; 7b...

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