Primary metabolites are the substances like amino acids on proteins structure that are used in the day to day function of the cell. Other than that plant and fungi have different molecules like alkaloid and different pigments and these are considered secondary metabolites.
Pigments-Carotenoids, Anthocyanins,
Alkaloids- Morphine, Codeine, etc.
Terpenoides-Monoterpenes, Diterpenes etc.
Essential oils-Lemon grass oil, etc.
Toxins-Abrin, Ricin
Lectins-Concanavalin A
Drugs-Vinblastin, curcumin, etc.
Polymer-Rubber, gums, cellulose