MONSANTO PHILIPPINES, INC., PETITIONER, VS. NATIONAL LABOR RELATIONS COMMISSION, MARTIN B. GENEROSO JR., ORVILLE P. PAGONZAGA, ROEL M. MORANO, ROEL T. MALINAO, FELMER Y. ESTAÑO, SHERWIN T. TABANAG, PONCIANO O. LARANIO, ARIEL F. BALILI, JERIH M. JUNTADO, JR., AND ANTONIO S. SISO, RESPONDENTS