^start of string
\{+the literal { (12310 / 1738 / 7B16) , repeated at least once
\{the literal { (12310 / 1738 / 7B16)
.*?any character (except for line terminators), repeated any number of times
\}the literal } (12510 / 1758 / 7D16)
\}+the literal } (12510 / 1758 / 7D16) , repeated at least once
$end of string, or before its final line terminator