
Keywords: فرمالدئید (PubChem CID: 712); Acyclovir (PubChem CID: 2022); Guanine (PubChem CID: 764); Formaldehyde (PubChem CID: 712); Ethylene glycol (PubChem CID: 174); Chemical stability; Stability-indicating method; Degradation pathway; Mass spectroscopy;