TCL21: Tacrolimus USP RC A Amount:50mg(E) 8 Ethyl 5,6,8,11,12,13,14,15,16,17,18,19,24,25,26,26a Hexadecahydro 5,19 dihydroxy 3 [(E) 2 (4 hydroxy 3 methoxycyclohexyl) 1 methylvinyl] 14,16 dimethoxy 4,10,12,18 tetramethyl 15,19 epoxy 3H pyrido[2,1 c][1,4] oxaazacyclotricosine 1,7,20,21 (4H,23H) tetrone ; CAS # 135635 46 0 ; C43H69NO12 ; MW: 792. 01 ;
Impurity and intermediate of acebrophylline
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4-Bis(benzo[d]isothiazol-3-yl)piperazine
