Error:
BF3 %2B H2O %3D %5BBF4%5D%3A- %2B H%3A%2B %2B H3BO3
^Unexpected character ('%')BF3 %2B H2O %3D %5BBF4%5D%3A- %2B H%3A%2B %2B H3BO3
^Unexpected character ('%')