Complex sentence: Instead of adamantane, Meerwein obtained 1,3,5,7-tetracarbomethoxybicyclo (3.3.1) nonane-2,6-dione: this compound was later named Meerwein's ester and used in the synthesis of adamantane and its derivatives.
Split into simpler sentences: Instead of adamantane, Meerwein obtained 1,3,5,7-tetracarbomethoxybicyclo (3.3.1) nonane-2,6-dione. This compound was later named Meerwein's ester and used in the syntheses of adamantane and its derivatives.