Commodity2005200620072008200920102011
Hydantoin & its derivs.   $2,300$3,581$3,399 
Heterocyclic comps. cont. an unfused imidazole ring (whether or not hydroge ...      $13,823
Heterocyclic comps. cont. a pyrimidine ring (whether or not hydrogenated)/p ... $3,524     
Heterocyclic comps. cont. an unfused triazine ring (whether or not hydrogen ...$1,561$612$669    
Total$1,561$4,136$669$2,300$3,581$3,399$13,823