<prompt> Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu: Passage: Furfural yakatanga kusarudzwa muna 1821 yakabudiswa muna 1832 nemakemikari wokuGermany ainzi Johann Wolfgang Döbereiner, uyo akabudisa mufananidzo muduku sechigadzirwa chefuric acid synthesis. Mubvunzo: Döbereiner akagadzira asidhi ipi?  <response>: svosve 