Regular Expressions 101

Negative Lookbehind(?<!Account n.:\s\d{3}.)

Account nthe literal text Account n (case sensitive)

.any character (except for line terminators)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\sany whitespace character

\d{3}a digit, repeated exactly 3 times

.any character (except for line terminators)

Negative Lookbehind(?<!(\d|\/))

Group 1(\d|\/)

1st Alternative\d

\da digit

2nd Alternative\/

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\d{7}a digit, repeated exactly 7 times

Negative Lookahead(?!.*has been received and is being reviewed by)

.*any character (except for line terminators), repeated any number of times

has been received and is being reviewed bythe literal text has been received and is being reviewed by (case sensitive)

Negative Lookahead(?!.*has been solved. To reopen)

.*any character (except for line terminators), repeated any number of times

has been solvedthe literal text has been solved (case sensitive)

.any character (except for line terminators)

To reopenthe literal text To reopen (case sensitive)

Negative Lookahead(?!\w)

\wany word character

Global pattern flags

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?<!Account n.:\s\d{3}.)(?<!(\d|\/))\d{7}(?!.*has been received and is being reviewed by)(?!.*has been solved. To reopen)(?!\w)

New

Account n.: 243-479688.71J
Your request (443760) has been solved. To reopen this request, reply to this email..
Article DOI: 10.3389/fchem.2020.500600
Article DOI: 10.3389/fchem.2020.5006001
Article DOI: 10.3389/fchem.2020.50060