3α-(benzyloxy)cyclobutane-1α-methanol

3α-<((tert-butyl)diphenylsilyloxy)methyl>cyclobutane-1α-ol

3α-<((tert-butyl)diphenylsilyloxy)methyl>cyclobut-1α-yl 4-bromobenzenesulfonate

ethyl 3-azidocyclobutanecarboxylate