4'-apo-beta-carotenal + 3-methyl-2-butenal => torulene + O2
4'-apo-beta-carotenal + 3-methyl-2-butenal => torulene + o2
4'-apo-beta-carotenal + 3-methyl-2-butenal => torulene + O2
4'-apo-beta-carotenal + 3-methyl-2-butenal => torulene + o2