Tk. Jones et al., SYNTHESIS AND BIOLOGICAL-ACTIVITY OF 4A4''-DISUBSTITUTED AVERMECTINS, Journal of agricultural and food chemistry, 42(8), 1994, pp. 1786-1790
Allylic oxidation of avermectin B-1 and C-4''-substituted avermectin B
-1 analogues at C-4a followed by derivatization of the C-4a oxygen pro
vides compounds that have an improved safety profile, as judged by mou
se LD(50) data, and are substantially more potent than avermectin B-1
against flies.