Curry Powder
and Curry leaves are different
Curry powder is a blend of various spices (Turmeric, red chilli, coriander seeds are the main spices and other spices are added as well)
Curry leaves are used Fresh and are added to enhance flavor of any dish
Curry powder contain different spices; the receipts are different for each country or region.
I don't quite know what you mean by "a pure substance", but if you mean whether or not curry powder is made by mixing multiple ingredients, then the answer is yes. Curry powder is made by mixing a few ingredients together
The botanical name for curry leaf is Murraya koenigii. Hope this helps you.
Murraya koenigii....
Buddy Curry's birth name is George Jessel Curry.
Declan Curry's birth name is Declan Gerald Curry.
Dell Curry's birth name is Wardell Stephen Curry.
Nick Curry's birth name is Nicholas Ray Curry.
Trish Curry's birth name is LaTrisha Patrice Curry.
Adrianne Curry's birth name is Adrianne Marie Curry.
Curry Kirkpatrick's birth name is Thomas Curry Kirkpatrick Jr..
flour
The Hindi name for Curry leaves is "कढ़ी पत्ता" (Kadhi Patta).