Debenzoylated 3-(β-d-glucopyranosyl)isoxazoles 11d,f and -isoxazolines 13a,b gave no significant inhibition against rabbit muscle glycogen phosphorylase b, and neither the protected nor unprotected galactopyranosyl derivatives 6d, 8b, 10a, and 12a exhibited significant activity against A2780 ovarian cancer cells. This evidence concerns the gene PYGB and ovarian carcinoma.