Em. Peters et al., Crystal structure of (3R,5R)-(+)-3-methyl-1-oxa-spiro[4.10]pentadec-9-en-2,6-dione, (OCOCHCH3CH2)(C)(COC9H16), Z KRIST-NEW, 216(2), 2001, pp. 225-226
C15H32O3, orthorhombic, P2(1)2(1)2(1) (NO. 19), a = 8.115(1) Angstrom, b =
8.706(1) Angstrom, c = 19.989(2) Angstrom, V = 1412.2 Angstrom (3), Z = 4,
R-gt(F) = 0.042, wR(ref)(F-2) = 0.117, T = 293 K.