5-dehydro-3-hydro-5,7,13-tri-O-(trimethylsilyl)avermectin B1a aglycone

[3S(E),3aR,4S,6S,7R,7aR)]-7-(tert-butyldimethylsilyloxy)-4-[(tert-butyldiphenylsilyloxy)methyl]octahydro-6-methyl-3-[2-(phenylsulphonyl)vinyl]benzofuran-3a-ol

<3R(E),3aR,4S,6S,7R,7aR>-7-(tert-butyldimethylsilyloxy)-4-<(tert-butyldiphenylsilyloxy)methyl>octahydro-6-methyl-3-<2-(phenylsulphonyl)vinyl>benzofuran-3a-ol

(4S)-5-dehydroxy-3,4-dihydro-5-oxo-4-(phenylselenyl)-7,13-di-O-(trimethylsilyl)avermectin B1a aglycone