#!/bin/bash
CellSite='Line 1
Line 2
Line 3
btsName = "NO74NO038",
Line 5
btsName = "RV74XC038","
Line 7
btsName = "no11no000",
'
btsName=$(awk -F\" 'NR==6{print $2; exit}' <<< "$CellSite")
echo "$btsName"
IyEvYmluL2Jhc2gKQ2VsbFNpdGU9J0xpbmUgMQpMaW5lIDIKTGluZSAzCiAgICBidHNOYW1lID0gIk5PNzROTzAzOCIsCkxpbmUgNQogICAgYnRzTmFtZSA9ICJSVjc0WEMwMzgiLCIKTGluZSA3CiAgICBidHNOYW1lID0gIm5vMTFubzAwMCIsCicKYnRzTmFtZT0kKGF3ayAtRlwiICdOUj09NntwcmludCAkMjsgZXhpdH0nIDw8PCAiJENlbGxTaXRlIikKZWNobyAiJGJ0c05hbWUi