regex match within parenthesis

regex match within parenthesis

I'm attempting to use some regular expressions that I made for Python also
work with R.
Here is what I have in Python (using the excellent re module), with my
expected 3 matches:
import re
line = 'VARIABLES = "First [T]" "Second [L]" "Third [1/T]"'
re.findall('"(.*?)"', line)
# ['First [T]', 'Second [L]', 'Third [1/T]']
Now with R, here is my best attempt:
line <- 'VARIABLES = "First [T]" "Second [L]" "Third [1/T]"'
m <- gregexpr('"(.*?)"', line)
regmatches(line, m)[[1]]
# [1] "\"First [T]\"" "\"Second [L]\"" "\"Third [1/T]\""
Why did R match the whole pattern, rather than just within the
parenthesis? I was expecting:
[1] "First [T]" "Second [L]" "Third [1/T]"
Furthermore, perl=TRUE didn't make any difference. Is it safe to assume
that R's regex does not consider matching only the parenthesis, or is
there some trick that I'm missing?