Commodity200520062007200820092010
Heterocyclic comps. cont. an unfused pyrazole ring (whether or not hydrogen ...     $54
Hydantoin & its derivs. $293    
Heterocyclic comps. cont. an unfused imidazole ring (whether or not hydroge ...     $62
Heterocyclic comps. cont. a pyrimidine ring (whether or not hydrogenated)/p ...$447  $224$380 
Heterocyclic comps. cont. an unfused triazine ring (whether or not hydrogen ...  $37  $175
Total$447$293$37$224$380$291