A new abietane diterpene glycoside from roots of Rabdosia japonica var. glaucocalyx / 中草药

Objective: To study the diterpenes in the roots of Rabdosia japonica var. glaucocalyx. Methods: The constituents of R. japonica var. glaucocalyx were separated and purified with chromatographic methods, and their structures were elucidated by spectroscopic methods. Results: Two compounds were isolated from the roots of R. japonica var. glaucocalyx, and they were identified as glaucocalyxoside (1) and inflexuside A (2). Conclusion: Compound 1 is a new abietane diterpene glycoside named glaucocalyxoside, and compound 2 is isolated from R. japonica var. glaucocalyx for the first time.