ChemInform Abstract: Novel and Efficient One‐Pot Synthesis of Spiro[indoline‐3, 4′‐pyrano[2, 3‐c]pyrazole]derivatives Catalyzed by L‐Pyroline in Aqueous Medium. Issue 51 (17th December 2013) - Yu, Jiangxia; Zhou, Yongbing; Shen, Tianhua; Mao, Wengang; Chen, Kang; Song, Qingbao