We work independently and through strategic collaborations and alliances with third parties to capitalize on our drug target discoveries and drug discovery and development programs. We seek to retain exclusive rights to the benefits of certain drug discovery and development programs by developing and commercializing drug candidates from those programs internally. We also collaborate with other pharmaceutical and biotechnology companies, such as Ipsen and Sanofi, with respect to the development and commercialization of drug candidates from other programs, particularly when the collaboration may provide us with access to expertise and complementary resources:
We entered into a collaboration and license agreement with Sanofi in November 2015, which was subsequently amended in July 2017, under which we granted Sanofi an exclusive, worldwide (excluding Japan), royalty-bearing right and license to develop, manufacture and commercialize sotagliflozin. We received a $300 million upfront payment under the agreement and we are eligible to receive up to $430 million upon the achievement of specified development and regulatory milestones and up to $990 million upon the achievement of specified sales milestones. We are also entitled to tiered, escalating royalties ranging from low double digit percentages to forty percent of net sales of sotagliflozin, based on indication and territory, with royalties for the higher band of such range attributable to net sales for type 1 diabetes in the United States, and subject in each case to customary royalty reduction provisions. Royalties payable with respect to net sales of sotagliflozin for type 1 diabetes in the United States will also be reduced in the event we do not exercise our co-promotion option.
We are responsible for all clinical development activities relating to type 1 diabetes and have exercised an exclusive option to co-promote and have a significant role, in collaboration with Sanofi, in the commercialization of sotafliflozin for the treatment of type 1 diabetes in the United States. Under the terms of the co-promotion option, we will fund forty percent of the commercialization costs relating to such co-promotion activities. Sanofi is responsible for all clinical development and commercialization of sotagliflozin for the treatment of type 2 diabetes worldwide and is solely responsible for the commercialization of sotagliflozin for the treatment of type 1 diabetes outside the United States. We have fulfilled our obligation to share in the funding of a portion of the type 2 diabetes development costs over the first three years of the collaboration, up to an aggregate of $100 million. Sanofi will book sales worldwide in all indications.
We entered into a license and collaboration agreement with Ipsen Pharma SAS in October 2014 under which we granted Ipsen an exclusive, royalty-bearing right and license to commercialize telotristat ethyl outside of the United States, Canada and Japan. The collaboration was expanded in March 2015 to include Canada. We received $24.5 million in upfront payments under the agreement and we are eligible to receive up to approximately $34 million upon the achievement of specified regulatory and commercial launch milestones and up to €72 million upon the achievement of specified sales milestones. We are also entitled to tiered, escalating royalties ranging from low twenties to mid-thirties percentages of net sales of telotristat ethyl in the licensed territory, subject to a credit for Ipsen’s payments to us for the manufacture and supply of such units of telotristat ethyl and customary royalty reduction provisions. Our receipt of these payments from Ipsen will trigger our obligation to make certain contingent payments to Symphony Icon Holdings LLC, or Holdings, pursuant to our prior arrangement with Holdings for the financing of the clinical development of telotristat ethyl.
Subject to certain exceptions, we are responsible for conducting clinical trials required to obtain regulatory approval for telotristat ethyl in the European Union and will have the first right to conduct most other clinical trials of telotristat ethyl.
We established a drug discovery alliance with Bristol-Myers Squibb Company in December 2003 to discover, develop and commercialize small molecule drugs in the neuroscience field. Bristol-Myers Squibb extended the target discovery term of the alliance in May 2006. We initiated the alliance with a number of neuroscience drug discovery programs at various stages of development and used our gene knockout technologies to identify additional drug targets with promise in the neuroscience field. For those targets that were selected for the alliance, we and Bristol-Myers Squibb are working together, on an exclusive basis, to identify, characterize and carry out the preclinical development of small molecule drugs, and share equally both in the costs and in the work attributable to those efforts. As drugs resulting from the alliance enter clinical trials, Bristol-Myers Squibb will have the first option to assume full responsibility for clinical development and commercialization. We received $86 million in upfront payments and research funding under the agreement during the target discovery portion of the alliance, which expired in October 2009. In addition, we are entitled to receive clinical and regulatory milestone payments ranging, depending on the timing and extent of our efforts in the alliance, up to $76 million for each drug developed by Bristol-Myers Squibb under the alliance. We will also earn royalties on sales of drugs commercialized by Bristol-Myers Squibb under the alliance.
We established a drug discovery alliance with Genentech, Inc. in December 2002 to discover novel therapeutic proteins and antibody targets. We and Genentech expanded the alliance in November 2005 for the advanced research, development and commercialization of new biotherapeutic drugs. Under the original alliance agreement, we used our target validation technologies to discover the functions of secreted proteins and potential antibody targets identified through Genentech’s internal drug discovery research. In the expanded alliance, we conducted additional, advanced research on a broad subset of those proteins and targets. We have exclusive rights to develop and commercialize biotherapeutic drugs for two of these targets, while Genentech has exclusive rights to develop and commercialize biotherapeutic drugs for the other targets. We retain certain other rights to discoveries made in the alliance, including non-exclusive rights, along with Genentech, for the development and commercialization of small molecule drugs addressing the targets included in the alliance. We received $58 million in upfront payments, research funding and research milestone payments under the agreement during the research collaboration term, which expired in November 2008. In addition, we are entitled to receive clinical and regulatory milestone payments ranging, depending on the extent of our efforts in the alliance, up to $25 million for each drug target for which Genentech develops a biotherapeutic drug under the alliance. We will also earn royalties on sales of biotherapeutic drugs commercialized by Genentech under the alliance. Genentech is entitled to receive milestone payments and royalties on sales of biotherapeutic drugs which we develop or commercialize under the alliance.
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