Steroidal and α-tocopherylhydroquinone glycosides from two soft corals Cladiella hirsuta and Sinularia nanolobata

Two new pregnane glycosides, hirsutosterosides A and B (1 and 2), as well as two new α-tocopherylhydroquinone glycosides, cladophenol glycosides A and B (3 and 4) were isolated from a soft coral Cladiella hirsuta. In addition, a new steroidal glycoside, lobatasteroside A (5) along with six known steroids (6-11), were discovered from the other soft coral Sinularia nanolobata. Their structures were elucidated by extensive spectroscopic analysis. Cytotoxicities of the isolates against a limited panel of cancer cell lines were reported. The inhibitory activities for superoxide anion generation and elastase release for these compounds were also examined to evaluate the anti-inflammatory potential.