- Phenylnaphthalene compounds from the subterranean part of Vitex rotundifolia and their antibacterial activity against methicillin-resistant Staphylococcus aureus. Kawazoe, K., Yutani, A., Tamemoto, K., Yuasa, S., Shibata, H., Higuti, T., Takaishi, Y. J. Nat. Prod. (2001)