Levonorgestrel English Synonyms: 17-ethynyl-18-methyl-19-nortestosteron; 18-methyl-17-alpha-ethynyl-19-nortestosterone CAS NO.: 797-63-7 Assay: 99％ Molecular Formula: C21H28O2 Molecular Weight: 312.45 Quality Standard: USP Packing: 1kg/foil bag/tin Appearance: White or almost white crystalline powder Usage: Progesterone drug, used for irregular menstruation, functional uterine bleeding, endometriosis, etc E-mail: zq@chembj.com Skype: fan-@outlook.com