A new steroidal glycoside phrygioside A and its aglycone from the starfish Hippasteria phrygiana

Three polyhydroxylated steroids were isolated from the Far-Eastern starfish Hippasteria phrygiana collected from the Sea of Okhotsk and were characterized as a new glycoside phrygioside A, viz., sodium (20R, 24S)-3β,4β,7α,8,15β,24-hexahydroxy-24-O-[3-O-methyl-β-D-xylopyranosyl-(1→2)-α-L-arabinofuranosyl]-5α-cholestan-6α-yl sulfate, its aglycone, and the already known marthasterone sulfate.