The promoters of Jyothy LaboratoriesBSE 0.63 % may extend the March 2017 deadline for its collaborator HenkelBSE 1.20 % AG to exercise the option to invest in the company, top officials close to the development said. The maker of Ujala fabric whitener is in advanced negotiations to sell a stake to Germany-based Henkel AG & Co and the talks have been held in Dubai, officials told ET