Duh C Y, Wu Y C, Wang S K
School of Pharmacy, Kaohsiung Medical College, Taiwan, Republic of China.
J Nat Prod. 1990 Nov-Dec;53(6):1575-7. doi: 10.1021/np50072a030.
Bioactivity-guided fractionation of a CHCl3 extract of the leaves of Piper aborescens afforded a new cytotoxic pyridone alkaloid, N-(3-methoxy-4,5-methylenedioxydihydrocinnamoyl)-delta 3-pyridin-2-one [1], as well as three known cytotoxic pyridone alkaloids, N-(3-methoxy-4,5-methylenedioxycinnamoyl)-delta 3-pyridin-2-one [2], piplartine [3], and piplartine dimer A [4].
