5-Acetyl-6-((3-methyl-2-butenyl)oxy)spiro(benzofuran-2(3H),1'-cyclopropan)-3-one 95418-01-2 BRN 5970764 Spiro(benzofuran-2(3H),1'-cyclopropan)-3-one, 5-acetyl-6-((3-methyl-2-butenyl)oxy)-