var re = new Regex(@"(?:\()((?:(?<p>\()|(?<-p>\))|[^()|]+|(?(p)(?!))(?<pipe>\|))*)(?:\))(?(p)(?!))(?(pipe)|(?!))");
			var matches = re.Matches("((((amusemen).emoadj().cap()(, (are we |arent we|I gather)|)?)");
			foreach (Match m in matches) {}