Oxygenated sterol derivatives. Their identification from the fungus-infected silkworm carcass, Bombyx cum Botryte, and their effects on growth and sterol metabolism of the silkworm, Bombyx mori.

Several oxygenated sterols, e.g. ergosterol peroxide, 7-oxocholesterol and 7β-hydroxycholesterol, were identified from the fungus-infected carcass of silkworm, Bombyx cum Botryte. However, they were nontoxic to the silkworm Bombyx mori reared on a diet containing these oxygenated sterols (0.01%) together with sitosterol or cholesterol (0.1%).