Hormones, prostaglandins, thromboxanes and leukotrienes, natural or reproduced by synthesis; derivatives and structural analogues thereof, including chain modified polypeptides, used primarily as hormones:

Prostaglandins, thromboxanes and leukotrienes, their derivatives and structural analogues

Other:

Acyclic hydrocarbons:

Cyclic hydrocarbons:

Halogenated derivatives of hydrocarbons:

Sulfonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated:

Acyclic alcohols and their halogenated, sulfonated, nitrated or nitrosated derivatives:

Cyclic alcohols and their halogenated, sulfonated, nitrated or nitrosated derivatives:

Phenols; phenol-alcohols: