Physiologically active substances of plant, process for the preparation thereof, and utilities thereof

摘要

A compound represented by the formula (I) wherein R<1>, R<2>, R<3>, R<4>, and R<5> each independently represents hydrogen, acetyl or benzyl, R<6> represents hydrogen, hydroxyl, acetoxy, or benzyloxy, R<7> represents hydrogen, or R<6> and R<7> together represent a direct bond, and R<8> represents carboxyl, methoxycarbonyl, hydroxymethyl, or acetoxymethyl; or a salt thereof. The compound is useful for plant culture, growth inhibition of moyashi roots, and growth promotion of moyashi hypocotyls.