[题目]Petasinine and petasinoside, two minor alkaloids possessing a new necine isolated from petasites japonicus maxim. 【作者】Kiyoyuki Yamada, *, Hiroshi Tatematsu, Ryoichi Unno and Yoshimasa HirataIwao Hirono 【期刊】Tetrahedron LettersVolume 19, Issue 46, 1978, Pages 4543-4546 【链接】http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6THS-42HP288-3F1&_user=1553337&_coverDate=12%2F31%2F1978&_rdoc=1&_fmt=high&_orig=search&_origin=search&_sort=d&_docanchor=&view=c&_acct=C000053666&_version=1&_urlVersion=0&_userid=1553337&md5=27e2a1cbc783c06751c81f5266613fa3&searchtype=a