What is the earliest alchemy dictionary in the world? What are the important contents in the book?

Shi Yao Erya is the earliest alchemy dictionary in the world. This book alone records 98 kinds of immortal pills, such as Taiyi Elixir, Taiyi Huandan, Shen Huan Zhubodan and Huayang Yujiangdan, and includes 97 kinds of exotic pills, such as Taiqing Jade Bird Classic, Xiao Jiu Junjing Classic and Maojun Yinyang Classic.