18

O 1.01696 -2.52360 0.17074
C 2.36667 -2.51260 -0.27782
C 3.19288 -1.66441 0.68142
C 4.66027 -1.49807 0.25413
C 5.36691 -0.51748 1.19344
C 5.41476 -2.82845 0.23382
H 0.51419 -3.07621 -0.45172
H 2.39232 -2.09536 -1.28951
H 2.72165 -3.54662 -0.30652
H 3.13575 -2.09945 1.68757
H 2.72104 -0.67659 0.76520
H 4.68685 -1.07260 -0.75734
H 5.37307 -0.88860 2.22386
H 4.86712 0.45684 1.18641
H 6.40535 -0.36056 0.88323
H 5.35973 -3.33045 1.20541
H 6.47189 -2.67166 -0.00597
H 5.00831 -3.50487 -0.52380