Accepted Manuscript A convergent synthesis of novel alkyne–azide cycloaddition congeners of be- tulinic acid as potent cytotoxic agent Nisar A. Dangroo, Jasvinder Singh, Santosh K. Rath, Nidhi Gupta, Arem Qayum, Shashank Singh, Payare L. Sangwan PII: S0039-128X(17)30055-7 DOI: http://dx.doi.org/10.1016/j.steroids.2017.04.002 Reference: STE 8092 To appear in: Steroids Received Date: 10 December 2016 Revised Date: 11 April 2017 Accepted Date: 12 April 2017 Please cite this article as: Dangroo, N.A., Singh, J., Rath, S.K., Gupta, N., Qayum, A., Singh, S., Sangwan, P.L., A convergent synthesis of novel alkyne–azide cycloaddition congeners of betulinic acid as potent cytotoxic agent, Steroids (2017), doi: http://dx.doi.org/10.1016/j.steroids.2017.04.002 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.