Remove multiple lines from a file

[BPradhan]

Hi All

I am trying to remove multiple lines from a file. But not successful yet.

The file contents are:

SID_LIST_LISTENER=

  (SID_LIST=

    (SID_DESC=

      (GLOBAL_DBNAME=RS5_DBADATATEST2)

      (ORACLE_HOME=/orahome/app/oracle/product/11.2.0/dbhome_1)

      (SID_NAME=RS5)

    )

    (SID_DESC=

      (GLOBAL_DBNAME=SUMMER_DBADATATEST2)

      (ORACLE_HOME=/orahome/app/oracle/product/11.2.0/dbhome_1)

      (SID_NAME=SUMMER)

    )

  )

and  I  am trying to remove the following lines only:

    (SID_DESC=

      (GLOBAL_DBNAME=RS5_DBADATATEST2)

      (ORACLE_HOME=/orahome/app/oracle/product/11.2.0/dbhome_1)

      (SID_NAME=RS5)

    )

1]     I tried with blockinfile (with state=absent), but does not work. Not sure what should be the "markers"

2]     lineinfile also does not work for me with the ones I tried.

Any pointer would help.

Regards

Bhabani