
Keywords: α-epoxy; 5α,6α-epoxycholesterol; β-epoxy; 5β,6β-epoxycholesterol; 24-OH; 24-hydroxycholesterol; 25-OH; 25-hydroxycholesterol; 27-OH; 27-hydroxycholesterol; 4β-OH; 4β-hydroxycholesterol; 7β-OH; 7β-hydroxycholesterol; 7α-OH; 7α-hydroxycholestero