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An n-alkatriene and some n-alkadienes from the A race of the green alga Botryococcus braunii
Affiliation:1. Center for Marine Studies, Federal University of Paraná, 83255-976 Pontal do Paraná, PR, Brazil;2. Graduate Program in Coastal and Oceanic Systems (PGSISCO) of the Federal University of Paraná, 83255-976 Pontal do Paraná, PR, Brazil;3. Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research, D-27515 Bremerhaven, Germany;4. MARUM Center for Marine Environmental Sciences and Department of Geosciences, University of Bremen, D-28359 Bremen, Germany;5. Oceanographic Institute, University of São Paulo, 05508-120 São Paulo, Brazil;1. BIO-P srl, Via Di Vannina, 88, 00156, Roma, Italy;2. Dipartimento di Ingegneria Chimica Materiali Ambiente, Università degli studi di Roma “La Sapienza”, Via Eudossiana 18, 00184, Rome, Italy;3. Facoltà Dipartimentale di Ingegneria, Università “Campus Bio-Medico” di Roma, Via Alvaro del Portillo 21, 00128, Roma, Italy;1. Institute of Environmental Engineering, Faculty of Civil and Environmental Engineering, Poznan University of Technology, Poznan, Poland;2. Department of Environment Engineering, Faculty of Environmental Sciences, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland;1. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences (CAS), Nanjing, 210008, China;2. Research Center for Ecology and Environment of Central Asia, Chinese Academy of Sciences, Urumqi, 830011, China;3. University of Chinese Academy of Sciences, Beijing, 100049, China
Abstract:The various strains of the hydrocarbon-rich alga Botryococcus braunii (A race) examined up to now produce the Z-isomers of the following dienes: tricosa-1,14-diene, pentacosa-1,16-diene, heptacosa-1,18-diene, nonacosa-1,20-diene and hentriaconta-1,22-diene. A C29 triene was also detected in these strains, but its structure was not fully elucidated. In the present work, spectroscopic data and oxidative degradations, established the structure of the C29 trienic hydrocarbon. These techniques were also used to examine the dienic series of a new A strain, collected from nature and laboratory grown. In addition to the usual Z-dienes, E-isomers of tricosa-1,14-diene, pentacosa-1,16-diene, heptacosa-1,18-diene and nonacosa-1,20-diene, were characterized.
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