Further studies on the constituents of the gorgonian octocoral Pseudopterogorgia elisabethae collected in San Andrés and Providencia islands, Colombian Caribbean: isolation of a putative biosynthetic intermediate leading to erogorgiaene |
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Authors: | Carmenza Duque Mónica Puyana Andrea Arias Oscar Osorno Noriyuki Hara |
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Institution: | a Departamento de Química, Universidad Nacional de Colombia, AA 14490 Bogotá, Colombia b Department of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan |
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Abstract: | Chemical investigations of the MeOH-CH2Cl2 extract of Pseudopterogorgia elisabethae specimens collected in the islands of San Andrés and Providencia, Colombian Caribbean, yielded four new diterpenes (1, 3, 5, 7) along with seco-pseudopterosin J (8), and amphilectosins A (9) and B (10). The structures of the new compounds were established through spectral studies as an elisabethatriene analog named elisabethatrienol (1), 10-acetoxy-9-hydroxy- and 9-acetoxy-10-hydroxy-amphilecta-8,10,12,14-tetraenes (isolated as an interconverting mixture) (3), amphilecta-8(13),11,14-triene-9,10-dione (5), and a seco-pseudopterosin 7-O-α-l-fucopyranoside named seco-pseudopterosin K (7). Elisabethatrienol can be regarded as a biosynthetic intermediate leading to erogorgiaene. |
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Keywords: | Pseudopterosin Seco-pseudopterosin Pseudopterogorgia elisabethae Elisabethatrienol Seco-pseudopterosin K |
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