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Spinosyn D 17-pseudoaglycone is a hydrolysis product of the minor insecticide component spinosyn D . Unlike spinosyn D, spinosyn D 17-pseudoaglycone is not lethal to tobacco budworms (H. virescens) when used at concentrations up to 64 ppm.

Spinosyn D 17-pseudoaglycone is an acid degradation product produced by selective hydrolysis of the more labile forosamine saccharide in the 17-position in spinosyn D, the minor component of commercial product, Spinosad. Spinosyn D 17-pseudoaglycone is only weakly active as an insecticide as the forosamine moiety is considered essential for potent activity. Despite the importance of spinosyns as agro-chemical insecticides and more recently as animal health products, there are few published reports of the biological activity or the levels of spinosyn D 17-pseudoaglycone in animals or in the environment.

[1] L C CREEMER  J W P  H A Kirst. Conversion of spinosyn A and spinosyn D to their respective 9- and 17-pseudoaglycones and their aglycones.[J]. Journal of Antibiotics, 1998, 51 8: 795-800. DOI: 10.7164/antibiotics.51.795