1. A salt or ester of folic acid. 
   叶酸一种盐或叶酸酯
2. sebacic acid, decanedioic acid 
   癸二酸
3. A toxic antimetabolite, C20H22N8O5, that acts as a folic acid antagonist to interfere with cellular reproduction and is used in the treatment of psoriasis and certain cancers. 
   甲氨蝶呤一种有毒的抗代谢物，c20h22n8o5，作为叶酸拮抗药抵制细胞繁殖，用于治疗牛皮癣和一些癌症
4. n acid derived from sulphuric acid. 
   从硫磺酸衍生而来的酸。
5. deoxyribonucleic acid double helix 
   脱氧核糖核酸双螺旋

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