p. 1066 - 1069
(2007/10/03)N-(but-3-ynyl)-N-(cyclobut-1-enylmethyl)-p-toluenesulfonamide
ethyl 1-bromocyclobutane-1-carboxylate
methyl 5-[N-(cyclobut-1-enylmethyl)-N-(p-toluenesulfonyl)amino]pent-2-ynoate
ethyl cyclobut-1-enecarboxylate
(1-cyclobutenyl)methyl alcohol