Studi Senyawa BIX01294 terhadap Viabilitas, Ultrastruktur, dan Ekspresi SFRP1 pada Sel Kanker Paru A549 sebagai Potensi Anti-Kanker = Study of BIX01294 Compound through Viability Analysis, Ultrastructural Observations, and SFRP1 Gene Expression in A549 Lung Cancer Cell Line as a Potential Anti-Cancer Agent