#include <MsgBoxConstants.au3> ; to declare the Constants of MsgBox
Local $sRegex = "(?m)^.*:\s+([A-Z].*)_(\D+)_(\d+).*"
Local $sString = "dog-Cf-Nox1: Porites_lobata_1381 49.126 572 275 8 1 564 1 564 0.0 563" & @CRLF & _
"dog-Cf-Nox1: Porites_australiensis_5912 48.776 572 277 8 1 564 1 564 0.0 560" & @CRLF & _
"dog-Cf-Nox1: Astreopora_sp_20372 48.776 572 276 9 1 564 1 563 0.0 555" & @CRLF & _
"dog-Cf-Nox1: Montastraea_cavernosa_106939 48.148 567 279 7 5 564 6 564 0.0 555" & @CRLF & _
"dog-Cf-Nox1: Seriatopora_hystrix_66126 50.000 554 262 7 18 564 19 564 0.0 553" & @CRLF & _
"dog-Cf-Nox1: Porites_australiensis_4812 46.946 573 287 6 1 564 1 565 0.0 553" & @CRLF & _
"dog-Cf-Nox1: Stylophora_pistillata_7748 49.009 555 268 7 17 564 18 564 0.0 550" & @CRLF & _
"dog-Cf-Nox1: Porites_lobata_724 46.435 575 289 7 1 564 1 567 0.0 548" & @CRLF & _
"dog-Cf-Nox1: Acropora_digitifera_16260 46.935 571 288 7 1 564 1 563 0.0 538"
Local $sSubst = "\1,\2,\3"
Local $sResult = StringRegExpReplace($sString, $sRegex, $sSubst)
MsgBox($MB_SYSTEMMODAL, "Result", $sResult)
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm