2H-5,7b-Ethanoindeno(1,7-bc)furan-2,7(7ah)-dione, hexahydro-7a,9,9-trimethyl-, (2aR-(2a-alpha,5-alpha,5a-beta,7a-alpha,7b-alpha)- 81130-69-0 BRN 5280366 Isoquadrone