Error:
Ca3%28PO4%292 %2B C %2B SiO2 %3D P4 %2B Ca%28SiO3%29 %2B CO
^
Unexpected character ('%')Ca3%28PO4%292 %2B C %2B SiO2 %3D P4 %2B Ca%28SiO3%29 %2B CO
^
Unexpected character ('%')