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Chen, Huansheng; Chen, Yu; Yuan, Li; Zou, Qing . (2013). A New Scalable Route to 4-(2-Hydroxyethyl)-1,3-dihydro-2 <i>H</i> -indol-2-one: A Key Intermediate for Ropinirole Hydrochloride. Organic Process Research & Development, 17(4), 714–717. doi:10.1021/op400024a 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research