00272nam a2200109 a 450000500170000008200160001710000180003324500410005125000120009226000360010430000220014020251203091602.0  a547.7IKAb_  aIkan, Raphael  aNatural products: a laboratory guide  a2nd ed.  aSan DiegobAcademic Pressc1991  axiv, 360p, 22 cm.