求Universal indicator（通用指示劑）的化學式

universal indicator is not one chemical
it is a mixture of chemicals, or a mixture of pH indicator
usually it will contain the following composition:
- Methanol(455) CH3OH
- Propan-1-ol C3H8O
- Water H2O
- Phenolphthalein, sodium salt C20H14O4 (Phenolphthalein)
- Methyl red, sodium salt C15H15N3O2 (Methyl red)
- Thymol blue, sodium salt C27H30O5S (Thymol blue)
- Bromthymol blue, sodium salt C27H28Br2O5S (Bromthymol blue)