title: New meroterpenoids from the Ascidian Aplidium conicum.
abstract: The ascidian Aplidium conicum from Tarifa Island contains the four new meroterpenoids conidione (1), conicol (2), 2-[(1'E)-3'-methoxy-3',7'-dimethylocta-1',6'-dienyl]benzene-1,4-diol (3), and conitriol (4) together with five related known compounds (5-9). It is proposed that the nonaromatic compound conidione (1) was derived by cyclization of an intermediate conitriol quinone 11. The structures of the new compounds were elucidated by interpretation of spectral data.
mesh_terms: D000107:Acetylation; D000818:Animals; D003500:Cyclization; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D013030:Spain; D013237:Stereoisomerism; D013729:Terpenes / Q000737:chemistry* / Q000302:isolation & purification*; D014561:Urochordata / Q000737:chemistry*
chemical_list: D013729:Terpenes