I have a character string and what to extract the information inside of multiple parentheses. Currently I can extract the information from the last parenthesis with the code below. How would I do it so it extracts multiple parentheses and returns as a vector? 

j <- "What kind of cheese isn't your cheese? (wonder) Nacho cheese! (groan) (Laugh)"                                                          
sub("\\).*", "", sub(".*\\(", "", j))

Current output is:

[1] "Laugh"

Desired output is:

[1] "wonder" "groan"  "Laugh"
regex r
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