Daphnin is one of the major coumarin bioactive components with antibacterial activity. Daphnin is isolated from the whole herb of Daphne odora (Thunb.), which is a folk medicine in China for the relief of fever[1][2].
[1]. Zhu J, et al. Investigation the interaction of Daphnin with human serum albumin using optical spectroscopy and molecular modeling methods. Spectrochim Acta A Mol Biomol Spectrosc. 2012 Sep;95:252-7.
[2]. Shakeel-U-Rehman, et al. Isolation, characterisation and antibacterial activity studies of coumarins from Rhododendron lepidotum Wall. ex G. Don, Ericaceae. Rev. bras. farmacogn. vol.20 no.6 Curitiba Dec. 2010 Epub Nov 12, 2010.