Yes it is Echites caryophylla Roxb.(or better Aganosma caryophyllata,
renamed by D.Don). In Bengali it is called Malati, a plant , very much
adored by Tagore. It is a climbing shrub , belonging to the family
Apocyanaceae. However, I suspect there is a Jasmine which is also
known as Malti, in some part of the country .