A 3-cephem derivative crystal which is a clathrate compound comprising p-methoxybenzyl ester of 7-phenylacetamide-3-formyl-3-cephem-4-carboxylic acid and dimethylformamide and a process for preparing the 3-cephem derivative crystal. In an embodiment, a method of reorganizing data in an original log file is disclosed. A second delay element delays the first reference signal with a tracking phase that centers between the two reference phases. In one illustrative case, the functionality can display action information in a timeline presentation. The wire deformation sensor electrically senses a physical quantity, which is associated with a deformation of the wire at a time of the collision. The composition is effective in the treatment of cancers including leukemia.