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- [30] REACTION OF KETENES WITH N,N-DISUBSTITUTED ALPHA-AMINOMETHYLENEKETONES .19. SYNTHESIS OF N,N-DISUBSTITUTED 4-AMINO-3-PHENYL-2H-FURO[2,3-H]-1-BENZOPYRAN-2-ONES (4-AMINO-3-PHENYLANGELICINS) - CRYSTAL AND MOLECULAR-STRUCTURE OF 3-PHENYLANGELICIN JOURNAL OF HETEROCYCLIC CHEMISTRY, 1988, 25 (02) : 407 - 413