2-furaldehid
reakčná zmes zložená z týchto látok: 1-(1,1-dimetyl-2,3,6,7,8,9-hexahydro-1-H-benzo[g]indén-4-yl)etanón; 1-(1,1-dimetyl-2,3,5,6,7,8-hexahydro-1-H-benzo[f]indén-4-yl)etanón; 1-(1,1-dimetyl-2,3,6,7,8,9-hexahydro-1-H-benzo[g]indén-5-yl)etanón; 1-(3,3-dimetyl-2,3,6,7,8,9-hexahydro-1-H-benzo[g]indén-5-yl)etanón