3931 Mesotrione Mesotrione is an herbicide sold under the brand names Callisto and Tenacity. It is a synthetic analog of leptospermone developed to mimic the effects of this natural herbicide. Mesotrione works by inhibiting the plant enzyme 4-hydroxyphenylpyruvate dioxygenase (HPPD) which is necessary for carotenoid biosynthesis. Without the protection from carotenoids, the chlorophyll necessary for plant growth is degraded by sunlight. 104206-82-8 175967 C14H13NO7S White powder. No indication of carcinogenicity to humans (not listed by IARC). This is a man-made compound that is used as a pesticide. 2013-04-25T07:56:52Z 2026-05-20T17:28:50Z 38321 true [H]C1=C([H])C(=C([H])C(=C1C(=O)C1([H])C(=O)C([H])([H])C([H])([H])C([H])([H])C1=O)[N+]([O-])=O)S(=O)(=O)C([H])([H])[H] C14H13NO7S InChI=1S/C14H13NO7S/c1-23(21,22)8-5-6-9(10(7-8)15(19)20)14(18)13-11(16)3-2-4-12(13)17/h5-7,13H,2-4H2,1H3 KPUREKXXPHOJQT-UHFFFAOYSA-N 339.321 339.041272465 Exogenous Solid CHEMBL1873440 153301 CHEM002837 DTXSID7032424 NS00000240 131.17 80.37770000000002 30.848519665937506 4 7 0 2.3690247888442326 -7.3113832717091825 -1 2 1.21 -4.08 2.81e-02 g/l