Abstract The structure of ovoic acid, a new tridepside from the lichen Parmelia substygia Ras. has been elucidated as 2′- O -methylgyrophoric acid by 13 C and 1 H NMR, by UV spectroscopy and by hydrolysis to orsellinic and isoeverninic acids.
摘要 卵酸的结构,一种来自地衣 Parmelia substygia Ras 的新三肽。已通过 13 C 和 1 H NMR、UV 光谱和水解成 orsellinic 和 isoeverninic 酸被阐明为 2'-O-methylgyrophoric acid。