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4,4′-Dihydroxybenzophenone is prepared by the rearrangement of p-hydroxyphenylbenzoate: HOC 6 H 4 CO 2 C 6 H 5 → (HOC 6 H 4) 2 CO. Alternatively, p-hydroxybenzoic acid can be converted to p-acetoxybenzoyl chloride. This acid chloride reacts with phenol to give, after deacetylation, 4,4′-dihydroxybenzophenone.
Sivifene (INN, USAN; developmental code name A-007) is a small-molecule antineoplastic agent and immunomodulator that was under development in the 2000s by Tigris Pharmaceuticals (now Kirax Corporation) as a topical treatment for cutaneous cancer metastases.
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430 N⋅m (317 lb⋅ft) at 1,700–3,600 rpm 2023–present Lexus NX 350: TAZA25 205 kW (275 hp; 279 PS) at 6,000 rpm 430 N⋅m (317 lb⋅ft) at 1,700–3,600 rpm 2021–present Lexus RX 350: TALA10 TALA15 2022–present Lexus TX 350: 2022–present Lexus RX 500h: TALH17 202 kW (271 hp; 275 PS) at 6,000 rpm
There are three structural isomers: 1,2-dihydroxybenzene (the ortho isomer) is commonly known as catechol, 1,3-dihydroxybenzene (the meta isomer) is commonly known as resorcinol, and 1,4-dihydroxybenzene (the para isomer) is commonly known as hydroquinone. [1]
They can also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 or 1-800-424-9153, or go to www.nhtsa.gov.
The scientists analyzed blood, urine, feces, and tissue samples and found three metabolites: 2,4-dihydroxybenzophenone (DHB), 2,2-dihydroxy-4-methoxybenzophenone (DHMB) and 2,3,4-trihydroxybenzophenone (THB). [28] [29] To form DHB the methoxy functional group undergoes O-dealkylation; to form THB the same ring is hydroxylated. [27]
Sixty nine cents a gallon for gasoline was even low for 1986 and you could buy gas with lead in it called "regular". A new study linked leaded gasoline to mental health conditions such as anxiety ...