[The studies on the chemical components of trutleback].

OBJECTIVE: Studies on the substance with nourishment Yin for a reasonable and rational auality appraise for turtleback. METHOD: To separate by chromatography and identifying with MS, 1H NMR, 13C NMR, IR. RESULT: Two compounds were separated and identified as hexadecanoyl cholesterol ester and cholesterol. CONCLUSION: The two compounds are isolated from turtleback for the first time.

[Isolation and identification of three steroid compounds from Mauremys mutics plastron].

OBJECTIVE: To investigate the steroids components from extract of Mauremys mutics. METHOD: The steroid compounds were isolated by using vacuum liquid chromatography and PTLC. The structures of three compounds were determined by spectral, chromatographic and chemical analysis. RESULTS: Three steroids were isolated from M. mutics and identified as cholesterol, elcosenoic acid cholesterol ester, cholester-4-ene-3-one. CONCLUSION: All the three compounds were isolated from M. mutics for the first time.

[Studies on the chemical constituents of soft coral Sarcophyton elegans].

The studies on the chemical constituents of soft coral Sarcophyton elegans led to the isolation of gorgosterol, batyl alcohol and simumeramide. Their structures were identified on the comprehensive spectral analysis. These compounds were first obtained from the soft coral.