<?php
$str = 'VN7-572G-75AJ(NX.G6GSA.001)';
preg_match('#^([^(]*)\(([^()]*)\)$#', $str, $matches); echo $matches[1] . "\n" . $matches[2];
PD9waHAKCiRzdHIgPSAnVk43LTU3MkctNzVBSihOWC5HNkdTQS4wMDEpJzsKcHJlZ19tYXRjaCgnI14oW14oXSopXCgoW14oKV0qKVwpJCMnLCAkc3RyLCAkbWF0Y2hlcyk7CmVjaG8gJG1hdGNoZXNbMV0gLiAiXG4iIC4gJG1hdGNoZXNbMl07