four-center-type reaction

18-Crown-6 5-Aminovaleramidase analytic character bacteriotropic serum blood agent gizza hackney horse half duplex computers Hikawa liquid ionization detector location of cracks microangium print end pulverized-coal burner reciprocity transaction register allocator synchondrosis xiphosternalis Trousseau-Lallemand bodies Vibrio desulphuricans white granite-ware