import re

s = 'Name  Mass  From  To  Disulphide bond  -2.02  97  144  Disulphide bond  -2.02  111  158  Disulphide bond  -2.02  121  174  Disulphide bond  -2.02  125  176  Disulphide bond  -2.02  85  174  Disulphide bond  -2.02  10  176'

arr = re.findall(r'(?<=Disulphide bond  -2.02  )(\d+)  (\d+)', s)

if len(arr) == 6:
   print arr