Sirivolu, Venkata Ramana; Vernekar, Sanjeev Kumar V.; Chen, Feng; Sham, Yuk Y.; Wang, Zhengqiang; Marchand, Christophe; Naumova, Alena; Chergui, Adel; Renaud, Amelie; Pommier, Yves; Stephen, Andrew G.
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Smith Kline and French Laboratories Limited
Patent: US4567176 A1, 1986 ;
US 4567176 A