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Piramal Healthcare rallied more than 7 percent after the drugmaker said on Saturday it would buy a 5.5 percent stake in Vodafone's India unit from Essar for 30 billion rupees ($616.14 million). At 9:19 a.m. (0349 GMT), the main 30-share BSE index was up 1.01 percent at 17,787.26, with 27 of its components advancing. The 50-share NSE index was up 0.97 percent at 5,376.60.