5-Acetyl-4-((3-methyl-2-butenyl)oxy)spiro(benzofuran-2(3H),1'-cyclopropan)-3-one 95418-00-1 BRN 5974743 Spiro(benzofuran-2(3H),1'-cyclopropan)-3-one, 5-acetyl-4-((3-methyl-2-butenyl)oxy)-