p. 3932 - 3937
(2008/09/21)7-(4-Methylphenyl)-6-oxaspiro<3.5>non-7-en-5,9-dion
5,9-Dioxo-7-phenyl-6-oxaspiro<3.5>non-7-en-8-carbonsaeure-ethylester
3'-phenyl-spiro[cyclobutane-1,6'-pyrazolo[5,1-b][1,3]oxazine]-2',5',7'-trione
3-chlorocyclobutanemethanol
3-chlorocyclobutanecarboxylic acid methyl ester