Synthesis of Unnatural Diethyl 2-Hydroxysuccinate From 2,3-Dihydroxysuccinic Acid As a Starting Material for Annonine Building Blocks. ANJS [Internet]. 2018 Dec. 2 [cited 2024 Nov. 4];21(4):30-7. Available from: https://mail.anjs.edu.iq/index.php/anjs/article/view/1983