北证50日内跌幅达1.12%，纳科诺尔跌4.32%

Group 1 - The core point of the article highlights that the North Exchange 50 index has experienced a decline of 1.12% over the past 50 days [2] - Among the constituent stocks, Naconor has seen a drop of 4.32%, while Senxuan Pharmaceutical has decreased by 3.93% [2] - Other notable declines include Yinuowei with a decrease of 3.51% and Tianma New Materials falling by 3.15% [2]