Medical publications and Prafulla Chandra Ray's works in the field of Chemistry proves that he had not invented the Hydroxychloroquine.
The NCBI publication has also stated that Quinine was first recognized as a potent antimalarial agent hundreds of years ago.
Further, an article published by the Indian National Science Academy stated that Acharya Prafulla Chandra Ray is the guru of Indian Chemistry, philanthropist and entrepreneur who founded Indian Chemical Society. The document sheds light on his chemical researches, and there is no mention of Hydroxychloroquine.
The COVID-19 pandemic has given rise to a lot of potentially dangerous misinformation. For reliable advice on COVID-19 including symptoms, prevention and available treatment, please refer to the World Health Organisation or your national healthcare authority.