Cambridge, MA-based Allurent, an online-shopping software startup, has closed down sometime in the past month, according to a report in the Boston Globe. The article says the company was in discussions with a potential acquirer until the end. Xconomy first reported on Allurent back in 2007, when the startup had just closed financing from Polaris Venture Partners. Last year, Allurent co-founder Joe Chung passed the CEO baton to Graeme Grant and became executive chairman of the firm. More recently, Chung and fellow Art Technology Group founder Jeet Singh have started working on a stealthy startup code-named Redstar. Allurent has been shrinking over the past few months as Polaris’s Dogpatch Labs incubator has expanded within its office space near Kendall Square.