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2,3-Dichloro-5,6-dicyano-1,4-benzoquinone (or DDQ) is the chemical reagent with formula C 6 Cl 2 (CN) 2 O 2. This oxidant is useful for the dehydrogenation of alcohols, [3] phenols, [4] and steroid ketones. [5] DDQ decomposes in water, but is stable in aqueous mineral acid. [6]
Beethoven's Piano Concerto No. 3 in C minor, Op. 37 is always thought to have been composed in 1800, although the year of its composition has been questioned by some contemporary musicologists. It was first performed on 5 April 1803, with the composer as soloist. [ 1 ]
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The Op. 63 Mazurkas by Frédéric Chopin are a set of three mazurkas for solo piano written in 1846 and published in 1847. These were Chopin's last set of mazurkas published during his lifetime. They demonstrate the composer's "late" style and may suggest a maturity of his emotional approach to the mazurka as a musical form. [1]
Engraved portrait of Dussek, published in 1867. This is a list of compositions by Jan Ladislav Dussek.. Cataloging Dussek's compositions has a history of its own. Dussek's oeuvre has historically been difficult to organize, due in part to the number of publishers who originally published his work, and to the fact that some of his works were published by more than one publisher.
Sergei Rachmaninoff's Prelude in C-sharp minor (Russian: Прелюдия, romanized: Prelyudiya), Op. 3, No. 2, is one of the composer's most famous compositions. Part of a set of five piano pieces titled Morceaux de fantaisie, it is a 62-bar prelude in ternary (ABA) form.
(1) Fmoc-protected amino group, (2) benzyl ester protected carboxyl group and (3) tert-butyl ether protected phenolic hydroxyl group of Tyrosine. Orthogonal protection is a strategy allowing the specific deprotection of one protective group in a multiply-protected structure.
Symphony No. 1 (1923) Asger Hamerik: Symphony in C minor, Op. 3 (1860, lost) Symphony No. 2 "Symphonie tragique", Op. 32 (1882–83) [9] Joseph Haydn: Symphony No. 52 (1771–72) Symphony No. 78 (1782) Symphony No. 95 (1791) William Herschel: Symphony No. 8 (1761) Heinrich von Herzogenberg: Symphony in C minor, WoO 29 (1878) [10] Symphony No. 1 ...