using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^[0-9]* *([a-zA-Z]+[0-9]*)+( *\+ *[0-9]*([a-zA-Z]{1,2}[0-9]*))* *-> *[0-9]* *([a-zA-Z]+[0-9]*)+( *\+ *[0-9]*([a-zA-Z]{1,2}[0-9]*))* *; *[a-z][0-9]+( *\* *[0-9]*([a-zA-Z]{1,2}[0-9]*))*$";
string substitution = @"";
string input = @"2H2 + O2 -> 2H2O; k1*H2*H2*O2
C + O2 -> CO2; k2*C*O2";
RegexOptions options = RegexOptions.Multiline;
Regex regex = new Regex(pattern, options);
string result = regex.Replace(input, substitution);
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx