Scientific information on chemical compounds included in crude drugs
Rhein

Molecular formula C15H8O6
Average molecular mass
(Molecular weight)
284.22
Exact molecular mass 284.032088 
[M+H]+ 285.04 
[M-H]- 283.024 
CAS 478-43-3
NIKKAJI  
PUBCHEM No. 10168
Crude drug Senna Leaf,Rhubarb
IUPAC_NAME 4,5-dihydroxy-9,10-dioxoanthracene-2-carboxylic acid
Remarks InChIKey (PubChem): FCDLCPWAQCPTKC-UHFFFAOYSA-N