This pattern uses alternation to match each specific item exactly. Special characters are properly escaped:
1. For currency amounts, each specific format is matched exactly, including spaces and special characters
2. For key patterns, special characters like <, >, [, ], # are escaped
3. For JSON structures, quotes and braces are escaped
4. Uses single alternation (|) operator to match any one of these exact patterns
5. Double quotes in JSON are escaped with a single backslash as per regex rules