A<sup>1</sup>HNMR STUDY ON THE FORMATION AND BREAKING OF INTRAMOLECULAR HYDROGEN BONDS O

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The formation and breaking of intramolecular hydrogen bondsof bilirubin in CDCl<sub>3</sub>-DMSO-d<sub>6</sub> binary solvent have been investigated by meansof NMR spectroscopy.The chemical shifts of protons at dipyrrinone lactam C
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(±)-Muricatain has been synthesized employing ringopening of allylic alcohol epoxide with lithium acetonitrileand lactonization.
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