linux - Grep for a special pattern -

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i looking pattern 1 below- 

.mm1(moda.portb) .mab(blah.pc)

i trying this-

grep -ir ".(*.*)"  .

unfortunately, expression, lot of results like- .mm1(moda) .mab(blah)

how change pattern can grep files in directory expression - .characters(characters.characters)

help appreciated, !

i'm not on unix environment sorry not testing, seems me wanna escape periods:

grep -ir "\.(*\.*)"  .

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