3.3.1. 24-Methylcholesta-6,24(28)-diene-3β,5α-diol (**1**)

White amorphous powder; [α] 22 <sup>D</sup> +45.0 (*<sup>c</sup>* 0.02, CHCl3); 1H and 13C NMR data (CDCl3), see Tables <sup>1</sup> and 2; EIMS *m/z*: 414 [M]+ (10), 396 [M − H2O]+(100), 378 (15), 363 (20), 312 (8), 276 (8), 141 (12), 109 (14); (+) HRESI MS *m/z* 437.3393 [M + Na]<sup>+</sup> (calcd. for C28H46O2Na, 437.3390).

3.3.2. 24-Methylcholesta-5,24(28)-diene-3β,4α-diol (**2**)

White amorphous powder; [α] 22 <sup>D</sup> +50.0 (*<sup>c</sup>* 0.08, CHCl3); 1H and 13C NMR data (CDCl3), see Tables <sup>1</sup> and 2; (+) HRESI MS *m/z* 437.3393 [M + Na]<sup>+</sup> (calcd. for C28H46O2Na, 437.3390).
