title: Ring-A hydroxylated dolastanes from the marine brown alga Dictyota dichotoma (Huds.) Lamour.
abstract: Marine brown alga Dictyota dichotoma (Dictyotaceae) collected from Karachi coast of Arabian Sea yielded two new dolastane-diterpenoids named: dichototetraol (1) and dichotopentaol (3) along with 2 of the same skeleton as a new source. Their structures have been characterized with the aid of 2D-NMR spectroscopic techniques.
authors.affiliation: H.E.J. Research Institute of Chemistry, University of Karachi, Karachi-75270, Pakistan.
authors.forename: Muhammad Shaiq
authors.initials: MS
authors.lastname: Ali
authors.forename: Muhammad Kashif
authors.initials: MK
authors.lastname: Pervez
mesh_terms: D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification*; D006900:Hydroxylation; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D015394:Molecular Structure; D000459:Phaeophyceae / Q000737:chemistry*
chemical_list: D004224:Diterpenes; C478123:dichotopentaol; C478122:dichototetraol