Zobrazeno 1 - 2
of 2
pro vyhledávání: '"Helenium flexuosum"'
Publikováno v:
Southeastern Naturalist. 5:515-522
Helenium virginicum (Virginia sneezeweed) is a federally listed threatened herb found at unshaded sites in seasonally inundated ponds in the Shenandoah Valley of Virginia and in the Ozark Highlands of Missouri. In the Ozarks, one population of H. vir
Publikováno v:
Tetrahedron. 20:1986
Two sesquiterpene lactone constituents of Helenium flexuosum Raf., flexuosin A and flexuosin B, have formulae C17H24O6 and C20H28O6.H2O, respectively. Structures I and XX have been assigned to them.