| Chemical class | Major constituents | Plant part | Associated biological activities | References |
| Phenolics
| Caffeic acid, vanillic acid, ferulic acid, chlorogenic acid, neochlorogenic acid, anisic acid, p-coumaric acid, protocatechuic acid, and p-hydroxy benzoic acid | Leaves, stems, roots, flowers, pollens, and trichomes.
| Allelopathic phytotoxicity useful as herbicide, growth regulation in micro- and macroflora, and autotoxic effect | [29, 122–124] |
| Flavonoids | Apigenin, luteolin, lignan, syringaresinol, quercetagetin dimethyl ether, 6-hydroxykaempferol 3,6-dimethyl ether, 6-hydroxykaempferol-3,6,4′-trimethyl ether (tanetin), kaempferol glucoside, quercetin glucoside, kaempferol glucoarabinoside, chrysoeriol, santin, saponins, jaceidin, centaureidin, and so forth | Leaves, stems, flowers and their calli, and pollens | Antioxidant, antimicrobial, anticancer, anti-inflammatory activities; antiulcerative, antispasmodic, diuretic, antihypertensive effects; platelet aggregation inhibition; inhibition of aldose reductase; cell cycle regulation; nodulation induction in peaR. leguminosarum association; plant defence against herbivores, pathogens, and harmful UV rays | [29, 122–125] |
| Pseudoguaianolides
| Parthenin, anhydroparthenin, 11-H,13-hydroxyparthenin, dihydroxyparthenin, dihydroisoparthenin, 13-methoxydihydroparthenin, 2β,13α-dimethoxydihydroparthenin, ambrosin, 13-methoxydihydroambrosin, coronopilin, 2β and 8β-hydroxycoronopilin, damsin, hymanin, scopoletin, hysterin, hysterones A to E, 8β-acetoxyhysterone C, tetraneurin-A and tetraneurin-E, deacetyltetraneurin A, charminarone, conchasin A artecanin, balchanin, costunolide, 3-β-hydroxycostunolide, epoxyartemorin, 8-α-hydroxyestafiatin, 1-β-hydroxyarbusculin, 5-β-hydroxyreynosin, and acetylated pseudoguaianolides | Stems, leaves, capitula/flowers and their calli, and trichomes | Cytotoxic, anticancer, antimicrobial, bioherbicidal, anti-inflammatory, antiprotozoan, pesticidal, insectidical, antimalarial activities; antineoplastic, antifeedant, larvicidal effects; allergies, diseases and milk tainting in livestock; inhibition of mitochondrial oxidative phosphorylation; autotoxic effect to regulate plant’s own germination and population | [29, 122, 123] |
| Oils | α-Pinene, α-thujene, α-phellandrene β-pinene, β-myrcene, β-terpene, β-ocimene, p-cymene, ρ-cymen-8-ol, camphor, camphene, caryophyllene, humulene, limonene, linalool, ocimene, sabinene, α-terpinene, γ-terpinene, α-terpineol, terpinene-4-ol, bornyl acetate, tricylene, chrysanthenone, pinocarvone, borneol, myrtenal, carvacrol, eugenol, trans-myrtenol acetate, isobornyl 2-methyl butanoate, caryophyllene oxide, germacrene, farnesene and their esters | Stems, leaves, roots, and flowers | Antimicrobial (against bacteria and fungi as well as viruses), pesticidal and insecticidal, antitussive, and helmethicidal activities, useful in medicinal and cosmetic industries and irritant, cardiotonic, antispasmodic and analgesic, stimulant, and sweat inducing effects | [29, 123–125] |
| Alkaloids | — | Roots and shoots | Antifungal, antioxidant, and anti-inflammatory activities and analgesic action | [123–126] |
|
Others | Histamine | Roots and shoots | — | [5, 122] | Free amino acids (abundant glycine, proline, alanine, and lysine) glucose, galactose, and KCl | Whole plant | Useful in compost and green manure; increases nutritive value of animal feed | [5, 29, 122] |
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