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Revision of the structure of cuculoquinone to 3,3′-bis(6-ethyl-2,5,7,8-tetrahydroxy-1,4-naphthoquinone) and confirmation of the proposed structure by synthesis
Abstract A reinvestigation of cuculoquinone, previously isolated from the lichen Cetraria cucullata , led to a revision of the proposed structure toExpand
Synthesis and study on oxidative coupling products of 3-alkyl-2-hydroxynaphthazarins
The resulting products of oxidative coupling of substituted 3-alkyl-2-hydroxynaphthazarins in the presence of lead dioxide are the compounds with 7,14-dibenzo[a,i]oxanthrene skeleton.
First record of Apatura iris (Linnaeus, 1758) (Lepidoptera: Nymphalidae) from the republic of Khakassia (South Siberia).
Apatura iris (Linnaeus, 1758) is recorded for the Republic of Khakassia (South Siberia) for the first time.
New data on the fauna of Heteroceridae (Coleoptera) of the Republic of Khakassia (Eastern Siberia)
The recent status of the family Heteroceridae in Siberia is discussed and the main references are given. From ten species of the Heteroceridae, which have been reported for the fauna of Siberia, onlyExpand
Materials to the fauna of caddisflies (Insecta: Trichoptera) from streams and reservoirs of the Ergaki Natural Park (Western Sayan)
For a little more than a century, researchers have been studying the fauna of caddisflies of streams and lakes of the Ergaki Natural Park. The paper provides a brief overview of studies of theExpand
Concerning the Stereoselectivity of the Oxidative Dimerization of 3-Alkyl-2-Hydroxy-1,4-Naphthoquinones in the Synthesis of Hybocarpone
Reinvestigation of 2-hydroxy-3-alkylnaphthoquinones oxidative dimerization was carried out. On the example of dihydrolapachol it is shown that the oxidative dimerization ofExpand
Total Synthesis of Hybocarpone, a Cytotoxic Naphthazarin Derivative from the Lichen Lecanora hybocarpa, and Related Compounds
The concise synthesis of the lichen-derived antitumor agent hybocarpone (1) and its analogs is described. A new synthetic approach is based on the direct oxidative dimerization of the availableExpand
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