Isao Wada

Penicillin crystal and process for producing the same

Transformation of Penicillins into 3-Substituted .DELTA.3-Cephems through Addition/Cyclization of Allenecarboxylates.

Processes for the preparation of beta-lactam derivative

Cyclization for preparing halo-cephems

Penicillin crystals and process for producing the same

Penicillinkristall und verfahren zu dessen herstellung Penicillin crystal and method of producing the

Crystal penicillin and process for production thereof.

Penicillin crystal and process for its manufacture

Cristal de penicilina y procedimiento para la producción del mismo.

PROCESSES FOR THE PREPARATION OF β-LACTAM DERIVATIVE