OH SO,N 79R=H 80R=SO怕 68 R:=R2=H.Ra=OH R0 70 R-O 73R= g7R,=HR2■H 0R 8. shallow-water to abyssal depths of 5400 m.The secondary The same group described another specimen of Northern metabolites of shallow-water holothuroids have been Pacific sea cucumber.Synallactes obtained at 540 m reviewed. (103).the first report of triterpene glycosides from the family Ocean near the K Islands,was found to cucumber glycosides. were previo This joumal isThe Royal Society of Chemistry 2008 Nat.Prod..Rep,2008,25,1131-11661139shallow-water to abyssal depths of 5400 m.147 The secondary metabolites of shallow-water holothuroids have been reviewed,130 and two examples of deep-sea cucumber metabolites have appeared in the literature. The North Pacific sea cucumber Pseudostichipus trachus, collected by deep-water trawling at 300 m in the Pacific Ocean near the Kuril Islands, was found to contain a novel sulfated triterpene glycoside, pseudostichoposide B (97), along with the known pseudostichoposide A (98).148,149 The same group described another specimen of Northern Pacific sea cucumber, Synallactes nozawai, obtained at 540 m depth by bottom trawling in the Sea of Japan, which yielded the synallactosides A1 (99), A2 (100), B1 (101), B2 (102), and C (103), the first report of triterpene glycosides from the family Synallactidae. The novel synallactosides A2–C (100–103) possess carbohydrate chains that were previously undescribed among sea cucumber glycosides.150 This journal is ª The Royal Society of Chemistry 2008 Nat. Prod. Rep., 2008, 25, 1131–1166 | 1139