(+)-Kavain 2H-Pyran-2-one, 5,6-dihydro-4-methoxy-6-(2-phenylethenyl)-, [R-(E)]- 2H-Pyran-2-one, 5,6-dihydro-4-methoxy-6-styryl-, (+)- 2H-Pyran-2-one, 5,6-dihydro-4-methoxy-6-styryl-, (R)- 500-64-1 Gonosan Kavain Kawain NSC112162