Unable to connect with PDB in single instance Database.

Hi All,

GDB12C =

  (DESCRIPTION =

    (ADDRESS = (PROTOCOL = TCP)(HOST = ShobhitLappy)(PORT = 1521))

    (CONNECT_DATA =

      (SERVER = DEDICATED)

      (SERVICE_NAME = gdb12c)

    )

  )

PDB01 =

  (DESCRIPTION =

    (ADDRESS = (PROTOCOL = TCP)(HOST = ShobhitLappy)(PORT = 1521))

    (CONNECT_DATA =

      (SERVER = DEDICATED)

      (SERVICE_NAME = pdb01)

    )

  )

Above written is my TNS Entry, but still i am unable to connect with my PDB database. PDB is running in READ WRITE mode.