... 2.competitive price 3.prompt delivery 4.powerful supply 5. we are a manufacturer, we have store ... CAS #.:518-28-5[Active ingredient] Podophyllotoxin[Synonym] 5,8,8a,9-retrahydro-9-hydroxy-5-(3,4,5-trimethoxylphenyl)furo[3 ... d]-1,3-dioxol-6(5aH)-one[CAS #] 518-28-5[Molecular Formula] C22H22O8[Molecular weight] 414.41[Specification] ... with very professinal answers! CAS 518-28-5 Natural Podophyllotoxin