00551nam a2200181Ia 450000500170000000800410001702000160005803500090007404100080008308200110009110000200010224500910012226000400021330000150025350000090026850500560027765000360033320260808125437.0260808s9999||||xx |||||||||||||| ||und||  a0 471276472  a4950  aENG  a547.85  aHurst, Derek T. 0aIntroduction to the chemistry and biochemistry of pyrimidines, purines, and pteridines  aNew YorkbJohn Wiely and Sonsc1980  aviii + 266  aGift  abiochemistry, organic chemistry, chemical synthesis  aBiochemistrybOrganic chemistry