1992
DOI: 10.1016/0031-9422(92)80482-t
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Dihydroxysterols from the marine red alga, Gracilaria edulis

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Cited by 13 publications
(8 citation statements)
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“…The characteristic 1 H NMR signals at ı 3.58 (1H, tt, J = 10.0, 5.0 Hz) and 3.42 (1H, dt, J = 11.0, 4.4 Hz) for H-3 and H-6 of 27, respectively, suggested a 3␤,6␣-dihydroxysteroid [34,35]. The sterol 27 was identified as stigmastane-3␤,6␣-diol by comparison its spectral data with those reported for stigmastane-3␤,6␣-diol (24R-ethyl-5␣-cholestane-3␤,6␣-diol, 28) [34,36], 5␣-poriferastane-3␤,6␣-diol (29) [35], 5␣-poriferastane-3␤,6␤-diol (30) [37], clionastane-3␣,6␤-diol (31) [38], and poriferastane-3␤,6␣-diol (29) [36], respectively (Tables 1 and 2, and Fig. 1).…”
Section: Resultsmentioning
confidence: 99%
“…The characteristic 1 H NMR signals at ı 3.58 (1H, tt, J = 10.0, 5.0 Hz) and 3.42 (1H, dt, J = 11.0, 4.4 Hz) for H-3 and H-6 of 27, respectively, suggested a 3␤,6␣-dihydroxysteroid [34,35]. The sterol 27 was identified as stigmastane-3␤,6␣-diol by comparison its spectral data with those reported for stigmastane-3␤,6␣-diol (24R-ethyl-5␣-cholestane-3␤,6␣-diol, 28) [34,36], 5␣-poriferastane-3␤,6␣-diol (29) [35], 5␣-poriferastane-3␤,6␤-diol (30) [37], clionastane-3␣,6␤-diol (31) [38], and poriferastane-3␤,6␣-diol (29) [36], respectively (Tables 1 and 2, and Fig. 1).…”
Section: Resultsmentioning
confidence: 99%
“…Negative electron impact mass spectrometry ; elution time 14:09, 14:32, 14:51 min; for 1 H and 13 C NMR data see Table 1. (Das et al, 1992). moiety at δ3.47.…”
Section: Resultsmentioning
confidence: 99%
“…These antimicrobial activities of the epiphytes are in great contrast to the observations made on clionasterol (1), which did not exhibit any activity. Consequently, we report on the isolation and structure determination of clionasterol, a triterpenoid previously only isolated from the Indian marine red alga Gracilaria edulis (Das et al, 1992) and from an earlier synthesis via a Wittig reaction of its analogue extracted from the sponge Verongia aerophoba (De Luca et al, 1973).…”
Section: Introductionmentioning
confidence: 99%
“…Chromatography of fractions SSA (III -VI) from S. syriaca afforded the following compounds: di-O-methyl apigenin (18) [17], salvigenin (3), oleanolic acid (6), genkwanin (19) [18], syriacine (2), ursolic acid (7), 11-oxoursolic acid (20) [18], 11-oxooleanolic acid (21) [18], Journal of Asian Natural Products Research 619 poriferast-5-en-3b,7a-diol (22) [19], 3b,11a-dihydroxy-17,22-seco-17(28),12-ursadien-22-oic acid (1), 1a,3a-dihydroxyolean-9(11),12-dien (23), maslinic acid (14), apigenin (17), and 2,3,24-trihydroxyolean-12-en-28-oic acid (24) [20]. The butanol fraction afforded the two flavonoids pectolinangenin (25) and luteolin-3 0 -methyl ether (10).…”
Section: Resultsmentioning
confidence: 99%