42 SOIL BACTERIAL HYDROLYSIS LEADING TO GENUINE AGLYCONE (10) : ON THE GLYCOSIDES OF METANARTHECIUM LUTEO-VIRIDE MAXIM. PART I
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It has hitherto been demonstrated that the soil bacterial hydrolysis method developed in our laboratory is a useful means to clarify the genuine sapogenins. By virtue of this novel method we have so far elucidated the genuine triterpenoid sapogenins of Senega root, Panax root, Ginseng root horse-chestnut, Styrax japonica pericarps, tea seeds, and Sanguisorbae Radix, and in addition, we have been able to show the method to be effective for hydrolysis of a diterpenoid glycoside (stevioside), and a monoterpenoid glycoside (dihydroharpagide). In the present study, the soil bacterial hydrolysis method has been applied to the glycosides of the titled plant, and the result has led to the isolation of new steroidal prosapogenins (designated NE-1, XIII) possessing fully acetylated arabinoside linkage at C-11 of a new steroidal sapogenin 3-epi-metagenin (IX), which is the first instance among the steroidal glycosides.
