[R] yet another regular expression

[Jim Lemon]

Hi all,
I have managed, with the help of glob2rx() to get two parts of a text 
manipulation working. I have successfully gotten rid of the first and 
second bits, but I have hit the wall trying to get rid of the last bit. Here's 
an example:

initString<-
 "\"Delete this\":value1,\"Delete this too\":value2},Delete last bit"
sub("\"Delete this too\":","",
 sub(glob2rx("*this\":*"),"",initString),fixed=TRUE)

This gives me:

[1] "value1,value2},Delete last bit"

and glob2rx("},*") just won't get rid of the last bit. I throw myself upon 
the mercy of the regular expression gurus.

Jim