Publications by authors named "Hiroka Yamada"
Four Ligularia individuals possessing morphological characters of both L. nelumbifolia and L. subspicata were discovered in Shangrila County, Yunnan Province, China.
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- * Identified sesquiterpenoids in Chemotype 1 and 2 samples, along with two new oplopane derivatives, while Chemotype 3 had phenylpropenoids as the main components.
- * No link was found between chemotype classifications and morphological characteristics, plus DNA analysis revealed extensive introgression among the sample populations.
From the roots of Ligularia oligonema and an unidentified sample of Ligularia collected in Yunnan Province of China, two new sesquiterpenoids, 3beta-acetoxy-6beta-(2-methylbutyryloxy)furanoeremophilan-10beta-ol and 3beta-acetoxy-6beta-isobutyryloxyfuranoeremophilan-10beta-ol, were isolated. DNA sequencing showed that the unidentified sample was likely to be L. oligonema.
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