Commodity2005200620072008200920102011
Tetrahydrofuran$118   $251$85 
Heterocyclic comps. cont. an unfused furan ring (whether or not hydrogenate ... $23$15 $415 $159
Coumarin, methylcoumarins & ethylcoumarins    $49  
Lactones (excl. coumarin, methylcoumarins & ethylcoumarins)$388$181$100$43$207$255$187
Total$506$204$115$43$922$340$346