You're correct on at least where the guess about possible chemicals came from. Search on possible phosphorous chemicals came back with Polyphosphates (https://

You're correct on at least where the guess about possible chemicals came from. Search on possible phosphorous chemicals came back with Polyphosphates (https://en.wikipedia.org/wiki/Polyphosphate https://en.wikipedia.org/wiki/Polyphosphate) as a major group, of which ADP (C10H15N5O10P2) is a major percentage. Polyphosphates in addition to Organic Phosphorous (https://en.wikipedia.org/wiki/Organophosphorus_chemistry https://en.wikipedia.org/wiki/Organophosphorus_chemistry) and Orthophosphate [PO4]3− (https://en.wikipedia.org/wiki/Phosphate https://en.wikipedia.org/wiki/Phosphate) as the other major constituents. https://www.sciencedirect.com/science/article/abs/pii/S2213343723023965 https://www.sciencedirect.com/science/article/abs/pii/S22133... A further search brought up that that Chinese found Apatite phosphorous is actually a major part. Triangular admixture of Ca10(PO4)6(OH)2, Ca10(PO4)6F2 and Ca10(PO4)6Cl2 https://en.wikipedia.org/wiki/Apatite https://en.wikipedia.org/wiki/Apatite https://www.sciencedirect.com/science/article/abs/pii/S0956053X18305750 https://www.sciencedirect.com/science/article/abs/pii/S09560...