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  1. x <- "Chemical: (BETA-CYFLUTHRIN = 118831)"
  2. regmatches(x, regexpr("(?<=\\().*?(?= =)", x, perl=TRUE))
Success #stdin #stdout 0.2s 39784KB
comments (?)
stdin 
Standard input is empty
stdout 
[1] "BETA-CYFLUTHRIN"
https://ideone.com/pagVgr
language:
R (R 3.5.2)
created:
7 years ago
visibility:
public

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