This paper describes the structural analysis by single crystal X-ray diffraction (XRD) of N-(4-methoxybenzyl)-L-tyrosine ethyl ester; a scorpion-like conformation was revealed between the ethoxycarbonyl group and the 4-hydroxyphenyl group. Zig-zag linear arrangements having head-to-tail intermolecular hydrogen bonds (O-H$\cdots$N) were also observed between N-(4-methoxybenzyl)-L-tyrosine ethyl ester units. It was determined that this amine reacts with formaldehyde to form linear dimers, trimers, and tetramers made up of N-(4-methoxybenzyl)-L-tyrosine ethyl ester units linked by methylene bridges.

中文翻译：

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N-(4-甲氧基苄基)-L-酪氨酸乙酯：合成、结构分析以及与甲醛的反应

本文介绍了N- (4-甲氧基苄基) -L-酪氨酸乙酯的单晶X射线衍射(XRD)结构分析；在乙氧基羰基和4-羟基苯基之间显示出蝎子状构象。锯齿形线性排列，具有头尾相连的分子间氢键（OH$\cdots$N)也在N- (4-甲氧基苄基)-L-酪氨酸乙酯单元之间观察到。经测定，该胺与甲醛反应形成由亚甲基桥连接的N- (4-甲氧基苄基)-L-酪氨酸乙酯单元组成的线性二聚体、三聚体和四聚体。