Margosic acid, nimbin, nimbinin, nimbidin 
Margosin,a crystalline principle, and tannic acid. 
Action & Uses : 
Bitter tonic, astringent,antipergative, antiseptic used in ulcers and eczema, skin diseases and in rheumatism. 
The oil obtained from the fruit is used for burning, that from the bark is used medicinally and is anthelmintic and emetic; it is applied externally for rheumatism. The decoction of Azadirachta is said to be cathartic and in large doses slightly narcotic. It is a stomachic and taps it for toddy. An ointment to destroy lice is made from the pulp and is also used for scald head and other skin diseases. It is useful for cramps, obstinate ulcers, etc. 

Margosic acid, nimbin, nimbinin, nimbidin 
Margosin,a crystalline principle, and tannic acid. 
Action & Uses : 
Bitter tonic, astringent,antipergative, antiseptic used in ulcers and eczema, skin diseases and in rheumatism. 
The oil obtained from the fruit is used for burning, that from the bark is used medicinally and is anthelmintic and emetic; it is applied externally for rheumatism. The decoction of Azadirachta is said to be cathartic and in large doses slightly narcotic. It is a stomachic and taps it for toddy. An ointment to destroy lice is made from the pulp and is also used for scald head and other skin diseases. It is useful for cramps, obstinate ulcers, etc.