0000927016-99-003170 S-3 6 19990903 BOSTON PROPERTIES INC 0001037540 6500 042473675 DE 1231 S-3 33 333-86585 99706508 800 BOYLSTON STREET SUITE 400 BOSTON MA 02199 6172363300 800 BOYLSTON STREET SUITE 400 BOSTON MA 02199 S-3 1 000092701699003170-001-seq1-s-3.txt FORM S-3 EX-5.1 2 000092701699003170-002-seq2-ex-5-1.txt OPINION OF GOODWIN, PROCTER & HOAR EX-8.1 3 000092701699003170-003-seq3-ex-8-1.txt FEDERAL INCOME TAX MATTERS EX-23.1 4 000092701699003170-004-seq4-ex-23-1.txt CONSENT OF PRICEWATERHOUSECOOPERS EX-23.2 5 000092701699003170-005-seq5-ex-23-2.txt CONSENT OF KPMG LLP EX-99.1 6 000092701699003170-006-seq6-ex-99-1.txt REGISTRATION RIGHTS AGREEMENT