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- [32] Reusable melamine trisulfonic acid-catalyzed three-component synthesis of 7-alkyl-6H,7H-naphtho[1′,2′:5,6]pyrano[3,2-c]chromen-6-ones Monatshefte für Chemie - Chemical Monthly, 2011, 142 : 163 - 167
- [33] Reusable melamine trisulfonic acid-catalyzed three-component synthesis of 7-alkyl-6H,7H-naphtho[1′,2′:5,6]pyrano[3,2-c]chromen-6-ones MONATSHEFTE FUR CHEMIE, 2011, 142 (02): : 163 - 167