SDF Reader Problem

Hello,

I have a problem to read a sd-file because of extenstion line at the end of the CTAB:

M  STY  1   1 SUP

M  SLB  1   1   1

M  SAL   1  3  22  31  32

M  SBL   1  1  25

M  SMT   1 O2N

M  SCL   1 CXN

M  SAP   1  1  22   1  1

M END

How can I extract tihe  kind of lines.

Thank for helping me

Bernd