69659-80-9 DS 201 DS-201 Danshen-201 Phenanthro(1,2-b)furan-2-sulfonic acid, 6,7,8,9,10,11-hexahydro-1,6,6-trimethyl-10,11-dioxo-, sodium salt Sodium tanshinone II A sulfonate Tanshinone II A sodium sulfonate