Regular Expressions 101

(?i)applies the following effective flags to the remainder of the pattern: gmi

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

^start of line

Negative Lookahead(?!.*interessado: )

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

interessado: the literal text interessado: (case insensitive)

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

CNPJthe literal text CNPJ (case insensitive)

\W+any character that is not a Unicode word character, repeated at least once

Group 1(\d+\.\d+\.\d+\s?\/\d+-\s?\d+)

\d+a Unicode decimal digit, repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a Unicode decimal digit, repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a Unicode decimal digit, repeated at least once

\s?optionally matches a Unicode whitespace character

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\d+a Unicode decimal digit, repeated at least once

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\s?optionally matches a Unicode whitespace character

\d+a Unicode decimal digit, repeated at least once

Global pattern flags

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

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?i)^(?!.*interessado: ).* CNPJ\W+(\d+\.\d+\.\d+\s?\/\d+-\s?\d+)

New

RECLAMADO: FOO LTDA - CNPJ: 99.999.999/9999-99
RECLAMADO: FOO FOO LTDA - CNPJ: 99.999.999/9999-99
TERCEIRO INTERESSADO: FOO FOO
TERCEIRO INTERESSADO: FOO FOO FOO FOO - CNPJ: 99.999.999/9999-99
TERCEIRO INTERESSADO: FOO FOO IT'S A TEST - CNPJ: 99.999.999/9999-99
TERCEIRO INTERESSADO: TEST
INTERESSADO: TEST - CNPJ: 99.999.999/9999-99