(1′R,2R,4E,4′S,10′E,14′E,16′E,21′R)-21′,24′-Dihydroxy-4-(methoxyimino)-5,11′,13′,22′-tetramethyl-6-[(2E)-4-methyl-2-penten-2-yl]-3,4,5,6-tetrahydro-2′H-spiro[pyran-2,6′-[3,7,19]trioxatetracyclo[15.6.1 .1~4,8~.0~20,24~]pentacosa[10,14,16,22]tetraen]-2′-one

(1′R,2R,4E,4′S,10′E,14′E,16′E,21′R)-21′,24′-Dihydroxy-4-(methoxyimino)-5,11′,13′,22′-tetramethyl-6-[(2E)-4-methyl-2-penten-2-yl]-3,4,5,6-tetrahydro-2′H-spiro[pyran-2,6′-[3,7,19]trioxatetracyclo[15.6.1 .1~4,8~.0~20,24~]pentacosa[10,14,16,22]tetraen]-2′-one

Moxidectin

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