Section 06 Products of the chemical or allied 29 Organic chemicals 29 37 Hormones, prostaglandins, thromboxanes and leukotrienes, natural or reproduced by synthesis; derivatives and structural analogues thereof, including chain modified polypeptides, used primarily as hormones Commodity Code Description 29 37 11 Somatotropin, its derivatives and structural analogues. 29 37 12 Insulin and its salts. 29 37 19 Other 29 37 21 Cortisone, hydrocortisone, prednisone (dehydrohydrocortisone) and prednisolone (dehydrocortisone) 29 37 22 Halogenated derivatives of corticosteroidal hormones 29 37 23 Oestrogens and progestogens 29 37 29 Other 29 37 50 Prostaglandins, thromboxanes and leukotrienes, their derivatives and structural analogues 29 37 90 Other