Hydroquinones from defensive secretion of a giant Pacific millipede, <Emphasis Type="Italic">Acladocricus setigerus</Emphasis> (Diplopoda: Spirobolida) |
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Authors: | Xiaogang Wu Donald W Buden Athula B Attygalle |
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Institution: | (1) Department of Chemistry and Chemical Biology, Stevens Institute of Technology, Hoboken, New Jersey 07030, USA;(2) Division of Natural Sciences and Mathematics, College of Micronesia-FSM, P.O. Box 159, Kolonia, Pohnpei, Federated States of Micronesia, 96941 |
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Abstract: | Summary. The presence of considerable quantities of hydroquinones including hydroquinone, 2-methylhydroquinone, 2,3- dimethoxyhydroquinone,
2-methoxy-3-methylhydroquinone, and 2,3-dimethoxy-5-methylhydroquinone renders the defensive secretion of Acladocricus setigerus (Silvestri, 1897) significantly different from that of other quinone-producing millipedes. In addition, two hitherto undescribed
compounds, namely, 2,3-dimethoxy-5-methylhydroquinone and 2-methyl-3,4-methylenedioxyphenol, were characterized from the defensive
secretion. However, it is uncertain if the latter compound is formed after the release of the secretion. The two major compounds,
2-methyl-1,4-benzoquinone and 2-methoxy-3-methyl-1,4-benzoquinone, constitute about 75% of the defensive fluid. Furthermore,
hydrocarbons, which are typically present in the secretions of most other arthropods that use benzoquinones as repellents,
are notably absent in the secretion of A. setigerus. |
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Keywords: | Chuuk Micronesia millipede Acladocricus setigerus chemical defense benzoquinones hydroquinones 2 3-dimethoxy-5-methylhydroquinone 2-methyl-3 4-methylenedioxyphenol |
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