239. Infrared spectra of natural products. Part VIII. The characterization of carbonyl groups and ethylenic double bonds in tetracyclic triterpenoids
- 1 January 1959
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society
- p. 1212-1218
- https://doi.org/10.1039/jr9590001212