regex string matching python3

[nanman3012 at gmail.com]

I have a string like this: 

b'\tC:94.3%[S:89.9%,D:4.4%],F:1.7%,M:4.0%,n:1440\n'

And I would like to  extract the numbers corresponding to S,D,F and M in this string and convert them into an array like this: 

[ '89.9', '4.4', '1.7', '4.0']

Any help would be appreciated!