Nikolova, Rosica P., Boris Shivachev, Bozhana Mikhova, Bistra Stamboliyska, Kristina Mladenovska, Ana P. Panovska, and Emil Popovski. “Synthesis and Structure of (<i>R,S</i>)-2-Methyl-4-(4-Nitrophenyl)-pyrano[3,2-c]chromen-5(4<i>H</I>)-One”. Macedonian Journal of Chemistry and Chemical Engineering 32, no. 2 (December 1, 2012): 239–250. Accessed April 24, 2024. https://mjcce.org.mk/index.php/MJCCE/article/view/445.