- Medicinal flowers. I. Aldose reductase inhibitors and three new eudesmane-type sesquiterpenes, kikkanols A, B, and C, from the flowers of Chrysanthemum indicum L. Yoshikawa, M., Morikawa, T., Murakami, T., Toguchida, I., Harima, S., Matsuda, H. Chem. Pharm. Bull. (1999)