1H-Naphtho(2,1-b)pyran-1-one, 3-(1-pyrrolidinyl)- 3-(1-Pyrrolidinyl)-1H-naphtho(2,1-b)pyran-1-one 35299-81-1 5-20-01-00473 (Beilstein Handbook Reference) BRN 4733872 K 8293