Abstract
ACCORDING to Gordin1, marrubiin, the optically active bitter principle of Marrubium vulgare, is a lactone, C21H28O4, m.p. 154.5°–155.5°, which on hydrolysis yields marrubic acid, C21H30O5, m.p. 173°–174°, forming an ethyl ester, m.p. 87°.
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References
Gordin, J. Amer. Chem. Soc., 30, 265 (1908).
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HOLLIS, F., RICHARDS, J. & ROBERTSON, A. Marrubiin, a Diterpenoid Lactone. Nature 143, 604 (1939). https://doi.org/10.1038/143604b0
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DOI: https://doi.org/10.1038/143604b0
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