How to change list of list to a string

I need to get:

'W1NaCl U1NaCl V1NaCl'

from:

[['W1NaCl'], ['U1NaCl'], ['V1NaCl']]

How to get required output in pythonic way

>Solution :

items = [['W1NaCl'], ['U1NaCl'], ['V1NaCl']]
res = " ".join([item[0] for item in items])

Which yields: W1NaCl U1NaCl V1NaCl