Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Article, Plant Physiology called Inhibition of carotenoid synthesis as a mechanism of action of amitrole, dichlormate, and pyriclor, Author is Burns, Earl R.; Buchanan, Gale A.; Carter, Mason C., which mentions a compound: 1970-40-7, SMILESS is OC1=C(Cl)C(Cl)=NC=C1Cl, Molecular C5H2Cl3NO, Recommanded Product: 2,3,5-Trichloropyridin-4-ol.
Amitrole (3-amino-s-triazole (I), dichlormate (3,4-dichlorobenzyl methylcarbamate (II), and pyriclor (2,3,5-trichloro-4-pyridinol) (III) inhibited normal carotenogenesis in etiolated wheat (Triticum aestivum) seedlings; carotenoid precursors accumulated in treated plants. In II-treated plants, ζ-carotene accumulated, whereas phytofluene, phytoene, and ζ-carotene accumulated in I- and III-treated plants. None of these herbicides interfered with protochlorophyllide synthesis or its conversion to chlorophyllide when etiolated plants were illuminated. Chlorophyll accumulated in treated plants exposed to light at 60 foot candles, but was unstable and partially destroyed by illumination at 4000 foot candles. This suggested that the phytotoxicity of these herbicides was due to inhibition of carotenoid synthesis and to consequent photodestruction of chlorophyll and of chloroplast disruption.
In addition to the literature in the link below, there is a lot of literature about this compound(2,3,5-Trichloropyridin-4-ol)Recommanded Product: 2,3,5-Trichloropyridin-4-ol, illustrating the importance and wide applicability of this compound(1970-40-7).
Reference:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem