(2a'E,2a1'R,4E,4'E,5S,6S,6'R,8'E,11'R,15'S,20a'R)-2a1'-hydroxy-4-(methoxyimino)-5,6',8',19'-tetramethyl-6-((E)-4-methylpent-2-en-2-yl)-2a1',3,4,5,6,6',7',10',11',14',15',20a'-dodecahydro-2'H,17'H-spiro[pyran-2,13'-[11,15]methano[1,5]dioxacyclooctadecino[9,8,7-cd]benzofuran]-17'-one; 2,5-Didehydro-5-deoxymoxidectin
