Dysotriflorins A-M, triterpenoids from dysoxylum densiflorum by Nugroho, M.E., Momota, T., Sugiura, R., Hanzawa, M., Yajima, E., Nagakura, Y., Yasuda, N., Hirasawa, Y., Wong, C.P., Kaneda, T., Hadi, A.H.A., Fukaya, H., Morita, H.