Commodity200520062007200820092010
Tetrahydrofuran$303     
Heterocyclic comps. cont. an unfused furan ring (whether or not hydrogenate ...  $1,887$1,232  
Lactones (excl. coumarin, methylcoumarins & ethylcoumarins) $176  $247$263
Total$303$176$1,887$1,232$247$263