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二新 megastigmane O-glucopyranosides,说出(2R,3R,5R,6S,9R )-3-hydroxy-5,6-epoxy- β -ionol-2-O- β -d-glucopyranoside (1 ) 并且(2R,3R,5R,6S,9R ) 和六已知的 megastigmanes 的 -3-hydroxyl-5,6-epoxy-acety- β -ionol-2-O- β -d-glucopyranoside (2 ) ,从 Broussonetia papyrifera (