Pengaruh penambahan KOH terhadap stabilitas senyawa 4-((E)-2-(4-okso-3-(4-metoksifenil)-kuinazolin-2-il)etinil) benzensulfasetamida yang dianalisis secara kromatografi lapis tipis densitometri = Effect of KOH additions to the stability of the compound 4-((E)-2-(4-oxo-3-(4-methoxyphenyl)-quinazoline-2-yl) ethinyl) benzensulphasetamide which analyzed by thin layer chromatography densitometry