import re
s = '/begin MEASUREMENT MSM_Struct.ANYNAME"Status ASC"'
_regex_struct = re.compile(r'/begin\s+MEASUREMENT MSM_Struct\.(\w+)')
m = _regex_struct.search(s)
if m:
print(m.group(1))
aW1wb3J0IHJlCnMgPSAnL2JlZ2luIE1FQVNVUkVNRU5UIE1TTV9TdHJ1Y3QuQU5ZTkFNRSJTdGF0dXMgQVNDIicKX3JlZ2V4X3N0cnVjdCA9IHJlLmNvbXBpbGUocicvYmVnaW5ccytNRUFTVVJFTUVOVCBNU01fU3RydWN0XC4oXHcrKScpIAptID0gX3JlZ2V4X3N0cnVjdC5zZWFyY2gocykKaWYgbToKICAgIHByaW50KG0uZ3JvdXAoMSkp