4 resultados
A new alkaloid, piperolactam E, and fourteen known compounds have been isolated from the stem of Piper taiwanense. Bioassay-guided fractionation of the methanolic extract led to the isolation, from the chloroform-soluble part, of 4-allylcatechol, eugenol, trans-caffeic aldehyde,
Bioassay-guided fractionation of roots from Piper taiwanense led to isolation of three neolignans, diallylcatechol (1) and neotaiwanensols A, B (2, 3), two diphenylpropanoid ethers, taiwandimerols A, B (4, 5), with one phenylpropanoid, 2,3-diacetoxy-1-methoxy-5-allylbenzene (6), previously unknown
Three new amides, taiwanamides A-C (1-3), and two known amides, 1-cinnamoylpyrrolidine (4) and 1-(m-methoxycinnamoyl)pyrrolide (5), have been isolated from the stem of Piper taiwanense. The structures of the new amides were determined by spectral analyses. These five amides exhibited inhibitory
Bioassay-guided fractionation of the active AcOEt-soluble fraction from the roots of Piper taiwanense has led to the isolation of two new phenylpropanoids, taiwanensols A and B (1 and 2, resp.), a new natural product, taiwanensol C (3), and 3-acetoxy-4-hydroxy-1-allylbenzene (4). The compounds were