Nefiracetam is a nootropic of the racetam family. Nefiracetam is cognitive enhancer with an IC50 of approximately 150–200 μM

for Ro 5-4864. This compound activates L/N-type calcium channels, cholinergic, monoaminergic and GABAergic systems.

Nefiracetam displays potent neuroprotective action in the retinal ischemia-reperfusion model.

Piracetam is a cognitive enhancer and memory enhancing supplement. Many people across the world use the nootropic, piracetam, to effectively retain knowledge andimprove memory. Piracetam is utilized by both younger and older healthy individuals.

From recent and past clinical studies and research, Piracetam has been determined to support memory and aid individuals experiencing memory loss and difficulties in the ability to retain knowledge. Piracetam may enhance, elevate, and improve cognitive functions and abilities linked and associated to the central nervous system, memory development and memory processes.

Qingdao Sigma Chemical Co., Ltd.is a global chemical industry manufacturers and suppliers of pharmaceuticals and intermediates, food and feed additives, herbal extracts, agrochemicals and fine chemicals etc.

The aim of Qingdao Sigma Chemical Co., Ltd is a quality policy that "Elements in the system all have been satisfied, Personnel has been trained; Every batch of material is checked, Each procedure guarantees the quality; Every bag of our products is top grade, Service is thoughtful all the time, quality and reputation to increase market share and promote enterprise development. The quality, colors and forms of our products have reached a high level in related chemical industry, which relies on characteristic and advanced processing technology and it has gained a high and reliable reputation from customers at both quality and services.

Qingdao Sigma Chemical Co., Ltd has become the "Top 500 Chinese manufacturing companies",

"Top 20 of global chemical sales".Qingdao Sigma Chemical Co., Ltdhas 21 subsidiaries and holding companies.