YF-0200R-B compound; molecular formula C<Sub>12</Sub>H<Sub>20</Sub>O<Sub>5</Sub>; molecular weight, 244, melting point; 143-145°C, specific rotation; [α]D<Sup>25</Sup>=6.5 (C=0.2, methanol; appearance; white crystals; acidic.;COPYRIGHT: (C)1994,JPO 展开 ...